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The September 11 attacks (also referred to as 9/11)[a] were a series of four coordinated terrorist attacks by the Islamic terrorist group al-Qaeda on the United States
United States
on the morning of Tuesday, September 11, 2001. The attacks killed 2,996 people, injured over 6,000 others, and caused at least $10 billion in infrastructure and property damage.[2][3] Four passenger airliners operated by two major U.S. passenger air carriers ( United Airlines
United Airlines
and American Airlines) – all of which departed from airports in the northeastern United States
United States
bound for California – were hijacked by 19 al-Qaeda terrorists. Two of the planes, American Airlines Flight 11
American Airlines Flight 11
and United Airlines
United Airlines
Flight 175, were crashed into the North and South towers, respectively, of the World Trade Center complex in New York City. Within an hour and 42 minutes, both 110-story towers collapsed, with debris and the resulting fires causing partial or complete collapse of all other buildings in the World Trade Center complex, including the 47-story 7 World Trade Center tower, as well as significant damage to ten other large surrounding structures. A third plane, American Airlines
American Airlines
Flight 77, was crashed into the Pentagon (the headquarters of the United States Department of Defense) in Arlington County, Virginia, leading to a partial collapse of the building's western side. The fourth plane, United Airlines
United Airlines
Flight 93, was initially steered toward Washington, D.C., but crashed into a field in Stonycreek Township near Shanksville, Pennsylvania, after its passengers tried to overcome the hijackers. 9/11 was the single deadliest incident for firefighters and law enforcement officers[4] in the history of the United States, with 343 and 72 killed respectively. Suspicion quickly fell on al-Qaeda. The United States
United States
responded by launching the War on Terror
War on Terror
and invading Afghanistan
Afghanistan
to depose the Taliban, which had harbored al-Qaeda. Many countries strengthened their anti-terrorism legislation and expanded the powers of law enforcement and intelligence agencies to prevent terrorist attacks. Although al-Qaeda's leader, Osama bin Laden, initially denied any involvement, in 2004 he claimed responsibility for the attacks.[1] Al-Qaeda
Al-Qaeda
and bin Laden cited U.S. support of Israel, the presence of U.S. troops in Saudi Arabia, and sanctions against Iraq
Iraq
as motives. After evading capture for almost a decade, Osama bin Laden
Osama bin Laden
was located and killed in Pakistan
Pakistan
by SEAL Team Six
SEAL Team Six
of the U.S. Navy
U.S. Navy
in May 2011. The destruction of the World Trade Center and nearby infrastructure caused serious damage to the economy of Lower Manhattan
Lower Manhattan
and had a significant effect on global markets, resulting in the closing of Wall Street until September 17 and the civilian airspace in the U.S. and Canada until September 13. Many closings, evacuations, and cancellations followed, out of respect or fear of further attacks. Cleanup of the World Trade Center site
World Trade Center site
was completed in May 2002, and the Pentagon was repaired within a year. On November 18, 2006, construction of One World Trade Center
One World Trade Center
began at the World Trade Center site. The building was officially opened on November 3, 2014.[5][6] Numerous memorials have been constructed, including the National September 11 Memorial & Museum in New York City, the Pentagon Memorial in Arlington County, Virginia, and the Flight 93 National Memorial in a field in Stonycreek Township near Shanksville, Pennsylvania.

Contents

1 Background

1.1 Al-Qaeda

1.1.1 Osama bin Laden 1.1.2 Khalid Sheikh Mohammed 1.1.3 Other al-Qaeda members

1.2 Motives 1.3 Planning 1.4 Prior intelligence

2 Attacks

2.1 Events 2.2 Casualties 2.3 Damage 2.4 Rescue efforts

3 Aftermath

3.1 Immediate response 3.2 Domestic reactions

3.2.1 Hate crimes 3.2.2 Muslim American response

3.3 International reactions 3.4 Military operations

4 Effects

4.1 Health issues 4.2 Economic 4.3 Cultural influence 4.4 Government policies toward terrorism

5 Investigations

5.1 FBI 5.2 CIA 5.3 Congressional inquiry 5.4 9/11 Commission 5.5 National Institute of Standards and Technology

6 Rebuilding 7 Memorials 8 See also 9 Notes 10 References

10.1 Citations 10.2 Bibliography

11 Further reading 12 External links

Background Al-Qaeda

v t e

Attacks by al-Qaeda

1992 Yemen hotel bombings 1998 United States
United States
embassy bombings USS Cole September 11 attacks Ghriba Faylaka Island attack Bali (1st) Mombasa Riyadh Casablanca Marriott Hotel Istanbul Madrid 2004 Khobar massacre Bali (2nd) 2005 Amman
Amman
Bombings Algiers Qahtaniya Islamabad Wanat Camp Chapman attack Pune In Amenas hostage crisis

Further information: Al-Qaeda
Al-Qaeda
and Jihad The origins of al-Qaeda can be traced to 1979 when the Soviet
Soviet
Union invaded Afghanistan. Osama bin Laden
Osama bin Laden
traveled to Afghanistan
Afghanistan
and helped organize Arab mujahideen to resist the Soviets.[7] Under the guidance of Ayman al-Zawahiri, bin Laden became more radical.[8] In 1996, bin Laden issued his first fatwā, calling for American soldiers to leave Saudi Arabia.[9] In a second fatwā in 1998, bin Laden outlined his objections to American foreign policy with respect to Israel, as well as the continued presence of American troops in Saudi Arabia
Saudi Arabia
after the Gulf War.[10] Bin Laden used Islamic texts to exhort Muslims to attack Americans until the stated grievances are reversed. Muslim legal scholars "have throughout Islamic history unanimously agreed that the jihad is an individual duty if the enemy destroys the Muslim countries", according to bin Laden.[10] Osama bin Laden Further information: Osama bin Laden, Death of Osama bin Laden, and Videos of Osama bin Laden

1997 photograph of Osama bin Laden

Bin Laden, who orchestrated the attacks, initially denied but later admitted involvement.[1][11][12] Al Jazeera
Al Jazeera
broadcast a statement by bin Laden on September 16, 2001, stating, "I stress that I have not carried out this act, which appears to have been carried out by individuals with their own motivation."[13] In November 2001, U.S. forces recovered a videotape from a destroyed house in Jalalabad, Afghanistan. In the video, bin Laden is seen talking to Khaled al-Harbi and admits foreknowledge of the attacks.[14] On December 27, 2001, a second bin Laden video was released. In the video, he said:

It has become clear that the West in general and America in particular have an unspeakable hatred for Islam. ... It is the hatred of crusaders. Terrorism
Terrorism
against America deserves to be praised because it was a response to injustice, aimed at forcing America to stop its support for Israel, which kills our people. ... We say that the end of the United States
United States
is imminent, whether Bin Laden or his followers are alive or dead, for the awakening of the Muslim umma (nation) has occurred

but he stopped short of admitting responsibility for the attacks.[15] The transcript refers several times to the United States
United States
specifically targeting Muslims. Shortly before the U.S. presidential election in 2004, in a taped statement, bin Laden publicly acknowledged al-Qaeda's involvement in the attacks on the U.S. and admitted his direct link to the attacks. He said that the attacks were carried out because:

we are free ... and want to regain freedom for our nation. As you undermine our security, we undermine yours.[16]

Bin Laden said he had personally directed his followers to attack the World Trade Center and the Pentagon.[12][17] Another video obtained by Al Jazeera
Al Jazeera
in September 2006 shows bin Laden with Ramzi bin al-Shibh, as well as two hijackers, Hamza al-Ghamdi
Hamza al-Ghamdi
and Wail al-Shehri, as they make preparations for the attacks.[18] The U.S. never formally indicted bin Laden for the 9/11 attacks but he was on the FBI's Most Wanted List for the bombings of the U.S. Embassies in Dar es Salaam, Tanzania, and Nairobi, Kenya.[19][20] After a 10-year manhunt, bin Laden was killed by American special forces in a compound in Abbottabad, Pakistan
Pakistan
on May 2, 2011.[21][22] Khalid Sheikh Mohammed Main article: Khalid Sheikh Mohammed

Khalid Sheikh Mohammed
Khalid Sheikh Mohammed
after his capture in 2003

The journalist Yosri Fouda of the Arabic television channel Al Jazeera reported that, in April 2002, Khalid Sheikh Mohammed
Khalid Sheikh Mohammed
admitted his involvement, along with Ramzi bin al-Shibh.[23][24][25] The 9/11 Commission Report determined that the animosity towards the United States felt by Mohammed, the principal architect of the 9/11 attacks, stemmed from his "violent disagreement with U.S. foreign policy favoring Israel".[26] Mohammed was also an adviser and financier of the 1993 World Trade Center bombing
1993 World Trade Center bombing
and the uncle of Ramzi Yousef, the lead bomber in that attack.[27][28] Mohammed was arrested on March 1, 2003, in Rawalpindi, Pakistan, by Pakistani security officials working with the CIA. He was then held at multiple CIA secret prisons and Guantanamo Bay where he was interrogated and tortured with methods including waterboarding.[29][30][31] During U.S. hearings at Guantanamo Bay in March 2007, Mohammed again confessed his responsibility for the attacks, stating he "was responsible for the 9/11 operation from A to Z" and that his statement was not made under duress.[25][32] Other al-Qaeda members Further information: Trials related to the September 11 attacks In "Substitution for Testimony of Khalid Sheikh Mohammed" from the trial of Zacarias Moussaoui, five people are identified as having been completely aware of the operation's details. They are bin Laden, Khalid Sheikh Mohammed, Ramzi bin al-Shibh, Abu Turab al-Urduni, and Mohammed Atef.[33] To date, only peripheral figures have been tried or convicted for the attacks. On September 26, 2005, the Spanish high court sentenced Abu Dahdah to 27 years in prison for conspiracy on the 9/11 attacks and being a member of the terrorist organization al-Qaeda. At the same time, another 17 al-Qaeda members were sentenced to penalties of between six and eleven years.[34] On February 16, 2006, the Spanish Supreme Court reduced the Abu Dahdah penalty to 12 years because it considered that his participation in the conspiracy was not proven.[35] Also, in 2006, Moussaoui, who some originally suspected might have been the assigned 20th hijacker, was convicted for the lesser role of conspiracy to commit acts of terrorism and air piracy. He is serving a life sentence without parole in the United States.[36][37] Mounir el-Motassadeq, an associate of the Hamburg-based hijackers, is serving 15 years in Germany for his role in helping the hijackers prepare for the attacks.[38] The Hamburg cell
Hamburg cell
in Germany included radical Islamists who eventually came to be key operatives in the 9/11 attacks.[39] Mohamed Atta, Marwan al-Shehhi, Ziad Jarrah, Ramzi bin al-Shibh, and Said Bahaji were all members of al-Qaeda's Hamburg
Hamburg
cell.[40] Motives Main article: Motives for the September 11 attacks Osama bin Laden's declaration of a holy war against the United States, and a 1998 fatwā signed by bin Laden and others, calling for the killing of Americans,[10] are seen by investigators as evidence of his motivation.[41] In bin Laden's November 2002 "Letter to America", he explicitly stated that al-Qaeda's motives for their attacks include:

U.S. support of Israel[42][43] support for the "attacks against Muslims" in Somalia support of Philippines
Philippines
against Muslims in the Moro conflict support for Israeli "aggression" against Muslims in Lebanon support of Russian "atrocities against Muslims" in Chechnya pro-American governments in the Middle East (who "act as your agents") being against Muslim interests support of Indian "oppression against Muslims" in Kashmir the presence of U.S. troops in Saudi Arabia[44][45] the sanctions against Iraq[46]

After the attacks, bin Laden and al-Zawahiri released additional video tapes and audio tapes, some of which repeated those reasons for the attacks. Two particularly important publications were bin Laden's 2002 "Letter to America",[47] and a 2004 video tape by bin Laden.[48] Bin Laden interpreted Muhammad
Muhammad
as having banned the "permanent presence of infidels in Arabia".[49] In 1996, bin Laden issued a fatwā calling for American troops to leave Saudi Arabia. In 1998, al-Qaeda wrote, "for over seven years the United States
United States
has been occupying the lands of Islam in the holiest of places, the Arabian Peninsula, plundering its riches, dictating to its rulers, humiliating its people, terrorizing its neighbors, and turning its bases in the Peninsula into a spearhead through which to fight the neighboring Muslim peoples."[50] In a December 1999 interview, bin Laden said he felt that Americans were "too near to Mecca", and considered this a provocation to the entire Muslim world.[51] One analysis of suicide terrorism suggested that without U.S. troops in Saudi Arabia, al-Qaeda likely would not have been able to get people to commit to suicide missions.[52] In the 1998 fatwā, al-Qaeda identified the Iraq sanctions
Iraq sanctions
as a reason to kill Americans, condemning the "protracted blockade"[50] among other actions that constitute a declaration of war against "Allah, his messenger, and Muslims."[50] The fatwā declared that "the ruling to kill the Americans and their allies – civilians and military – is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque of Mecca
Mecca
from their grip, and in order for their [the Americans'] armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim."[10][53] Bin Laden claimed, in 2004, that the idea of destroying the towers had first occurred to him in 1982, when he witnessed Israel's bombardment of high-rise apartment buildings during the 1982 Lebanon
Lebanon
War.[54][55] Some analysts, including Mearsheimer and Walt, also claim that one motivation for the attacks was U.S. support of Israel.[43][51] In 2004 and 2010, bin Laden again connected the September 11 attacks with U.S. support of Israel, although most of the letter expressed bin Laden's disdain for President Bush and bin Laden's hope to "destroy and bankrupt" the U.S.[56][57] Other motives have been suggested in addition to those stated by bin Laden and al-Qaeda, including western support of Islamic and non-Islamic authoritarian regimes in Saudi Arabia, Iran, Egypt, Iraq, Pakistan
Pakistan
and northern Africa, and the presence of western troops in some of these countries.[58][page needed] Some authors suggest the "humiliation" resulting from the Islamic world falling behind the Western world – this discrepancy rendered especially visible by the globalization trend[59][60] and a desire to provoke the U.S. into a broader war against the Islamic world in the hope of motivating more allies to support al-Qaeda. Similarly, others have argued that 9/11 was a strategic move with the objective of provoking America into a war that would incite a pan-Islamic revolution.[61][62] Planning Main article: Planning of the September 11 attacks

Map showing the attacks on the World Trade Center (the planes are not drawn to scale)

The idea for the attacks came from Khalid Sheikh Mohammed, who first presented it to Osama bin Laden
Osama bin Laden
in 1996.[63] At that time, bin Laden and al-Qaeda were in a period of transition, having just relocated back to Afghanistan
Afghanistan
from Sudan.[64] The 1998 African Embassy bombings and bin Laden's 1998 fatwā marked a turning point, as bin Laden became intent on attacking the United States.[64] In late 1998 or early 1999, bin Laden gave approval for Mohammed to go forward with organizing the plot. A series of meetings occurred in early 1999, involving Mohammed, bin Laden, and his deputy Mohammed Atef.[64] Atef provided operational support for the plot, including target selections and helping arrange travel for the hijackers.[64] Bin Laden overruled Mohammed, rejecting some potential targets such as the U.S. Bank Tower in Los Angeles because "there was not enough time to prepare for such an operation".[65][66]

Diagram showing the attacks on the World Trade Center

Bin Laden provided leadership and financial support for the plot and was involved in selecting participants.[67] Bin Laden initially selected Nawaf al-Hazmi
Nawaf al-Hazmi
and Khalid al-Mihdhar, both experienced jihadists who had fought in Bosnia. Hazmi and Mihdhar arrived in the United States
United States
in mid-January 2000. In spring 2000, Hazmi and Mihdhar took flying lessons in San Diego, California, but both spoke little English, performed poorly with flying lessons, and eventually served as secondary – or "muscle" – hijackers.[68][69] In late 1999, a group of men from Hamburg, Germany arrived in Afghanistan, including Mohamed Atta, Marwan al-Shehhi, Ziad Jarrah, and Ramzi bin al-Shibh.[70] Bin Laden selected these men because they were educated, could speak English, and had experience living in the West.[71] New recruits were routinely screened for special skills and al-Qaeda leaders consequently discovered that Hani Hanjour already had a commercial pilot's license.[72] Mohammed later said that he helped the hijackers blend in by teaching them how to order food in restaurants and dress in Western clothing.[73] Hanjour arrived in San Diego on December 8, 2000, joining Hazmi.[74]:6–7 They soon left for Arizona, where Hanjour took refresher training.[74]:7 Marwan al-Shehhi
Marwan al-Shehhi
arrived at the end of May 2000, while Atta arrived on June 3, 2000, and Jarrah arrived on June 27, 2000.[74]:6 Bin al-Shibh applied several times for a visa to the United States, but as a Yemeni, he was rejected out of concerns he would overstay his visa and remain as an illegal immigrant.[74]:4, 14 Bin al-Shibh stayed in Hamburg, providing coordination between Atta and Mohammed.[74]:16 The three Hamburg cell
Hamburg cell
members all took pilot training in South Florida.[74]:6 In spring of 2001, the secondary hijackers began arriving in the United States.[75] In July 2001, Atta met with bin al-Shibh in Spain, where they coordinated details of the plot, including final target selection. Bin al-Shibh also passed along bin Laden's wish for the attacks to be carried out as soon as possible.[76] Some of the hijackers received passports from corrupt Saudi officials who were family members, or used fraudulent passports to gain entry.[77] Prior intelligence In late 1999, al-Qaeda associate Walid bin Attash
Walid bin Attash
("Khallad") contacted Mihdhar, telling him to meet him in Kuala Lumpur, Malaysia; Hazmi and Abu Bara al Yemeni would also be in attendance. The NSA intercepted a telephone call mentioning the meeting, Mihdhar, and the name "Nawaf" (Hazmi). While the agency feared that "Something nefarious might be afoot", it took no further action. The CIA had already been alerted by Saudi intelligence to the status of Mihdhar and Hazmi as al-Qaeda members, and a CIA team broke into Mihdhar's Dubai
Dubai
hotel room and discovered that Mihdhar had a U.S. visa. While Alec Station alerted intelligence agencies worldwide about this fact, it did not share this information with the FBI. The Malaysian Special Branch observed the January 5, 2000, meeting of the two al-Qaeda members, and informed the CIA that Mihdhar, Hazmi, and Khallad were flying to Bangkok, but the CIA never notified other agencies of this, nor did it ask the State Department
State Department
to put Mihdhar on its watchlist. An FBI liaison to Alec Station asked permission to inform the FBI of the meeting, but was told that "'This is not a matter for the FBI.'"[78] By late June, senior counter-terrorism official Richard Clarke and CIA director George Tenet
George Tenet
were "convinced that a major series of attacks was about to come", although the CIA believed that the attacks would likely occur in Saudi Arabia
Saudi Arabia
or Israel.[79] In early July, Clarke put domestic agencies on "full alert", telling them that "Something really spectacular is going to happen here... soon." He asked the FBI and the State Department
State Department
to alert the embassies and police departments, and the Defense Department to go to "Threat Condition Delta."[80][81] Clarke would later write that "Somewhere in CIA there was information that two known al Qaeda terrorists had come into the United States... in [the] FBI there was information that strange things had been going on at flight schools in the United States... They had specific information about individual terrorists... None of that information got to me or the White House."[82] On July 13, Tom Wilshire, a CIA agent assigned to the FBI's international terrorism division, emailed his superiors at the CIA's Counterterrorism Center (CTC), requesting permission to inform the FBI that Hazmi was in the country and that Mihdhar had a U.S. visa. The CIA never responded.[83] The same day in July, Margarette Gillespie, an FBI analyst working in the CTC, was told to review material about the Malaysia
Malaysia
meeting. She was not told of the participants' presence in the U.S. The CIA gave Gillespie surveillance photos of Mihdhar and Hazmi from the meeting to show to FBI counterterrorism but did not tell her their significance. The Intelink database informed her not to share intelligence material on the meeting to criminal investigators. When shown the photos, the FBI were refused more details on their significance, and also did not receive Mihdhar's date of birth or passport number.[84] In late August 2001, Gillespie told the INS, the State Department, the Customs Service, and the FBI to put Hazmi and Mihdhar on their watchlists, but the FBI was prohibited from using criminal agents in the search for the duo, which hindered their efforts.[85] Also in July, a Phoenix-based FBI agent sent a message to FBI headquarters, Alec Station, and to FBI agents in New York, alerting them to "the possibility of a coordinated effort by Osama bin Laden
Osama bin Laden
to send students to the United States
United States
to attend civil aviation universities and colleges." The agent, Kenneth Williams, suggested the need to interview all flight school managers and identify all Arab students seeking flight training.[86] In July, Jordan
Jordan
alerted the U.S. that al-Qaeda was planning an attack on the U.S.; "months later", Jordan
Jordan
notified the U.S. that the attack's codename was "The Big Wedding", and that it involved airplanes.[87] On August 6, the CIA's Presidential Daily Brief, designated "For the President Only", was entitled "Bin Ladin Determined to Strike in U.S." The memo noted that "The FBI information... indicates patterns of suspicious activity in this country consistent with preparations for hijackings or other types of attacks."[88] In mid-August, one Minnesota
Minnesota
flight school alerted the FBI to Zacarias Moussaoui, who had asked "suspicious questions." The FBI found that he was a radical who had traveled to Pakistan, and the INS arrested him for overstaying his French visa. Their request to search his laptop was denied by FBI headquarters due to the lack of probable cause.[89] The failures in intelligence-sharing were attributed to 1995 Justice Department policies limiting intelligence sharing, combined with CIA and NSA
NSA
reluctance in revealing "sensitive sources and methods" such as tapped phones.[90] Testifying before the 9/11 Commission
9/11 Commission
in April 2004, then- Attorney General John Ashcroft
John Ashcroft
recalled that the "single greatest structural cause for the September 11th problem was the wall that segregated or separated criminal investigators and intelligence agents."[91] Clarke also wrote that "There were failures in the organizations... failures to get information to the right place at the right time..."[92] Attacks Further information: Timeline for the day of the September 11 attacks

Flight paths of the four planes used on September 11

Early on the morning of September 11, 2001, 19 hijackers took control of four commercial airliners (two Boeing 757
Boeing 757
and two Boeing 767) en route to California (three headed to LAX in Los Angeles, and one to SFO in San Francisco) after takeoffs from Logan International Airport in Boston, Massachusetts; Newark Liberty International Airport
Newark Liberty International Airport
in Newark, New Jersey; and Washington Dulles International Airport
Washington Dulles International Airport
in Loudoun and Fairfax counties in Virginia.[93] Large planes with long flights were selected for hijacking because they would be heavily fueled.[94] The four flights were:

American Airlines
American Airlines
Flight 11: a Boeing 767
Boeing 767
aircraft, departed Logan Airport at 7:59 a.m. en route to Los Angeles with a crew of 11 and 76 passengers, not including five hijackers. The hijackers flew the plane into the northern facade of the North Tower of the World Trade Center in New York City at 8:46 a.m. United Airlines
United Airlines
Flight 175: a Boeing 767
Boeing 767
aircraft, departed Logan Airport at 8:14 a.m. en route to Los Angeles with a crew of nine and 51 passengers, not including five hijackers. The hijackers flew the plane into the southern facade of the South Tower of the World Trade Center in New York City at 9:03 a.m. American Airlines
American Airlines
Flight 77: a Boeing 757
Boeing 757
aircraft, departed Washington Dulles International Airport
Washington Dulles International Airport
at 8:20 a.m. en route to Los Angeles with a crew of six and 53 passengers, not including five hijackers. The hijackers flew the plane into the western facade of the Pentagon in Arlington County, Virginia, at 9:37 a.m. United Airlines
United Airlines
Flight 93: a Boeing 757
Boeing 757
aircraft, departed Newark International Airport at 8:42 am en route to San Francisco, with a crew of seven and 33 passengers, not including four hijackers. As passengers attempted to subdue the hijackers, the aircraft crashed into a field in Stonycreek Township near Shanksville, Pennsylvania, at 10:03 a.m.

Media coverage was extensive during the attacks and aftermath, beginning moments after the first crash into the World Trade Center.[95] Events

Plume of September 11 attack seen from space by NASA[96]

At 8:46 am, five hijackers crashed American Airlines
American Airlines
Flight 11 into the northern façade of the World Trade Center's North Tower (1 WTC), and at 9:03 am, another five hijackers crashed United Airlines Flight 175
United Airlines Flight 175
into the southern façade of the South Tower (2 WTC).[97][98] Five hijackers flew American Airlines Flight 77 into the Pentagon at 9:37 am.[99] A fourth flight, United Airlines
United Airlines
Flight 93, under the control of four hijackers, crashed near Shanksville, Pennsylvania, southeast of Pittsburgh, at 10:03 a.m. after the passengers fought the hijackers. Flight 93's target is believed to have been either the Capitol or the White House.[94] Flight 93's cockpit voice recorder revealed crew and passengers tried to seize control of the plane from the hijackers after learning through phone calls that Flights 11, 77, and 175 had been crashed into buildings that morning.[100] Once it became evident to the hijackers that the passengers might regain control of the plane, the hijackers rolled the plane and intentionally crashed it.[101][102]

Collapse of the Towers

The north face of Two World Trade Center
Two World Trade Center
(south tower) immediately after being struck by United Airlines
United Airlines
Flight 175

Some passengers and crew members who called from the aircraft using the cabin airphone service and mobile phones provided details: several hijackers were aboard each plane; they used mace, tear gas, or pepper spray to overcome attendants; and some people aboard had been stabbed.[103] Reports indicated hijackers stabbed and killed pilots, flight attendants, and one or more passengers.[93][104] According to the 9/11 Commission's final report, the hijackers had recently purchased multi-function hand tools and assorted Leatherman-type utility knives with locking blades, which were not forbidden to passengers at the time, but were not found among the possessions left behind by the hijackers.[105][106] A flight attendant on Flight 11, a passenger on Flight 175, and passengers on Flight 93 said the hijackers had bombs, but one of the passengers said he thought the bombs were fake. The FBI found no traces of explosives at the crash sites, and the 9/11 Commission
9/11 Commission
concluded that the bombs were probably fake.[93] Three buildings in the World Trade Center collapsed due to fire-induced structural failure.[107] The South Tower collapsed at 9:59 a.m. after burning for 56 minutes in a fire caused by the impact of United Airlines Flight 175
United Airlines Flight 175
and the explosion of its fuel.[107] The North Tower collapsed at 10:28 a.m. after burning for 102 minutes.[107] When the North Tower collapsed, debris fell on the nearby 7 World Trade Center
7 World Trade Center
building (7 WTC), damaging it and starting fires. These fires burned for hours, compromising the building's structural integrity, and 7 WTC collapsed at 5:21 pm.[108][109] The west side of the Pentagon sustained significant damage.

Play media

Security camera footage of American Airlines Flight 77
American Airlines Flight 77
hitting the Pentagon.[110] The plane hits the Pentagon approximately 86 seconds after the start of this recording.

At 9:42 am, the Federal Aviation Administration
Federal Aviation Administration
(FAA) grounded all civilian aircraft within the continental U.S., and civilian aircraft already in flight were told to land immediately.[111] All international civilian aircraft were either turned back or redirected to airports in Canada or Mexico, and were banned from landing on United States territory
United States territory
for three days.[112] The attacks created widespread confusion among news organizations and air traffic controllers. Among the unconfirmed and often contradictory news reports aired throughout the day, one of the most prevalent said a car bomb had been detonated at the U.S. State Department's headquarters in Washington, D.C.[113] Another jet—Delta Air Lines Flight 1989—was suspected of having been hijacked, but the aircraft responded to controllers and landed safely in Cleveland, Ohio.[114] In an April 2002 interview, Khalid Sheikh Mohammed
Khalid Sheikh Mohammed
and Ramzi bin al-Shibh, who are believed to have organized the attacks, said Flight 93's intended target was the United States
United States
Capitol, not the White House.[115] During the planning stage of the attacks, Mohamed Atta, the hijacker and pilot of Flight 11, thought the White House
White House
might be too tough a target and sought an assessment from Hani Hanjour (who hijacked and piloted Flight 77).[116] Mohammed said al-Qaeda initially planned to target nuclear installations rather than the World Trade Center and the Pentagon, but decided against it, fearing things could "get out of control".[117] Final decisions on targets, according to Mohammed, were left in the hands of the pilots.[116] Casualties Main articles: Casualties of the September 11 attacks and Emergency workers killed in the September 11 attacks

The remains of 6, 7, and 1 WTC on September 17, 2001

A surviving portion of the wall from the Twin Towers

The attacks caused the deaths of 2,996 people and the injuries of more than 6,000 others.[118] The death toll included 265 on the four planes (from which there were no survivors), 2,606 in the World Trade Center and in the surrounding area, and 125 at the Pentagon.[119][120] Nearly all of those who perished were civilians with the exceptions of 343 firefighters, 72 law enforcement officers, 55 military personnel, and the 19 terrorists who died in the attacks.[121][122] After New York, New Jersey lost the most state citizens, with the city of Hoboken having the most citizens that died in the attacks.[123] More than 90 countries lost citizens in the September 11 attacks;[124] for example, the 67 Britons who died were more than in any other terrorist attack anywhere as of October 2002[update].[125] The attacks are the worst terrorist attack in world history, and the deadliest foreign attack on American soil since the attack on Pearl Harbor on December 7, 1941.[3] In Arlington County, Virginia, 125 Pentagon workers lost their lives when Flight 77 crashed into the western side of the building. Of these, 70 were civilians and 55 were military personnel, many of them who worked for the United States Army
United States Army
or the United States
United States
Navy. The Army lost 47 civilian employees, six civilian contractors, and 22 soldiers, while the Navy lost six civilian employees, three civilian contractors, and 33 sailors. Seven Defense Intelligence Agency
Defense Intelligence Agency
(DIA) civilian employees were also among the dead in the attack, as well as an Office of the Secretary of Defense
Office of the Secretary of Defense
(OSD) contractor.[126][127][128] Lieutenant General
Lieutenant General
Timothy Maude, an Army Deputy Chief of Staff, was the highest-ranking military official killed at the Pentagon.[129]

Statue of Liberty with background view of burning World Trade Center

In New York City, more than 90% of the workers and visitors who died in the towers had been at or above the points of impact.[130] In the North Tower, 1,355 people at or above the point of impact were trapped and died of smoke inhalation, fell or jumped from the tower to escape the smoke and flames, or were killed in the building's eventual collapse. The destruction of all three staircases in the tower when Flight 11 hit made it impossible for anyone above the impact zone to escape. 107 people below the point of impact died as well.[130] In the South Tower, one stairwell, Stairwell A, was left intact after Flight 175 hit, allowing 14 people located on the floors of impact (including one man who saw the plane coming at him) and four more from the floors above to escape. New York City 911 operators who received calls from individuals inside the tower were not well informed of the situation as it rapidly unfolded and as a result, told callers not to descend the tower on their own.[131] In total 630 people died in that tower, fewer than half the number killed in the North Tower.[130] Casualties in the South Tower were significantly reduced by some occupants deciding to start evacuating as soon as the North Tower was struck.[132] The failure to fully evacuate the South Tower after the first jet crash into the North Tower was described by USA Today
USA Today
as "one of the day's great tragedies".[133]

Urban Search and Rescue Task Force German Shepherd
German Shepherd
dog works to uncover survivors at the site of the collapsed World Trade Center after the September 11, 2001, attacks.

At least 200 people fell or jumped to their deaths from the burning towers (as exemplified in the photograph The Falling Man), landing on the streets and rooftops of adjacent buildings hundreds of feet below.[134] Some occupants of each tower above the point of impact made their way toward the roof in hope of helicopter rescue, but the roof access doors were locked.[135] No plan existed for helicopter rescues, and the combination of roof equipment and thick smoke and intense heat prevented helicopters from approaching.[136] A total of 411 emergency workers died as they tried to rescue people and fight fires. The New York City Fire Department
New York City Fire Department
(FDNY) lost 343 firefighters, including a chaplain and two paramedics.[137] The New York City Police Department (NYPD) lost 23 officers.[138] The Port Authority Police Department (PAPD) lost 37 officers.[139] Eight emergency medical technicians (EMTs) and paramedics from private emergency medical services units were killed.[140] Cantor Fitzgerald
Cantor Fitzgerald
L.P., an investment bank on the 101st–105th floors of the North Tower, lost 658 employees, considerably more than any other employer.[141] Marsh Inc., located immediately below Cantor Fitzgerald on floors 93–100, lost 358 employees,[142][143] and 175 employees of Aon Corporation
Aon Corporation
were also killed.[144] The National Institute of Standards and Technology (NIST) estimated that about 17,400 civilians were in the World Trade Center complex at the time of the attacks. Turnstile counts from the Port Authority suggest 14,154 people were typically in the Twin Towers by 8:45 am.[145][146] Most people below the impact zone safely evacuated the buildings.[147]

Deaths (victims + hijackers)

New York City World Trade Center 2,606[119][148]

American 11 87 + 5[149]

United 175 60 + 5[150]

Arlington Pentagon 125[151]

American 77 59 + 5[152]

Near Shanksville United 93 40 + 4[153]

Total 2,977 + 19

Weeks after the attack, the death toll was estimated to be over 6,000, more than twice the number of deaths eventually confirmed.[154] The city was only able to identify remains for about 1,600 of the World Trade Center victims. The medical examiner's office collected "about 10,000 unidentified bone and tissue fragments that cannot be matched to the list of the dead".[155] Bone fragments were still being found in 2006 by workers who were preparing to demolish the damaged Deutsche Bank Building. In 2010, a team of anthropologists and archaeologists searched for human remains and personal items at the Fresh Kills Landfill, where seventy-two more human remains were recovered, bringing the total found to 1,845. DNA profiling continues in an attempt to identify additional victims.[156][157][158] The remains are being held in storage in Memorial Park, outside the New York City Medical Examiner's facilities. It was expected that the remains would be moved in 2013 to a repository behind a wall at the 9/11 museum. In July 2011, a team of scientists at the Office of Chief Medical Examiner was still trying to identify remains, in the hope that improved technology will allow them to identify other victims.[158] On August 7, 2017, the 1,641st victim was identified as a result of newly available DNA technology.[159] There are still 1,112 victims who have not been identified.[160] Damage Further information: Collapse of the World Trade Center

World Trade Center site
World Trade Center site
(Ground Zero) with an overlay showing the original building locations

The Pentagon
The Pentagon
was damaged by fire and partly collapsed.

Along with the 110-floor Twin Towers, numerous other buildings at the World Trade Center site
World Trade Center site
were destroyed or badly damaged, including WTC buildings 3 through 7 and St. Nicholas Greek Orthodox Church.[161] The North Tower, South Tower, the Marriott Hotel (3 WTC), and 7 WTC were completely destroyed. The U.S. Customs House (6 World Trade Center), 4 World Trade Center, 5 World Trade Center, and both pedestrian bridges connecting buildings were severely damaged. The Deutsche Bank Building
Deutsche Bank Building
on 130 Liberty Street was partially damaged and demolished some years later, starting in 2007.[162][163] The two buildings of the World Financial Center also suffered damage.[162] The Deutsche Bank Building
Deutsche Bank Building
across Liberty Street from the World Trade Center complex was later condemned as uninhabitable because of toxic conditions inside the office tower, and was deconstructed.[164][165] The Borough of Manhattan Community College's Fiterman Hall at 30 West Broadway was condemned due to extensive damage in the attacks, and is being rebuilt.[166] Other neighboring buildings (including 90 West Street and the Verizon Building) suffered major damage but have been restored.[167] World Financial Center buildings, One Liberty Plaza, the Millenium Hilton, and 90 Church Street had moderate damage and have since been restored.[168] Communications equipment on top of the North Tower was also destroyed, with only WCBS-TV
WCBS-TV
maintaining a backup transmitter on the Empire State Building, but media stations were quickly able to reroute the signals and resume their broadcasts.[161][169] The PATH train system's World Trade Center station was located under the complex. As a result, the entire station was demolished completely when the towers collapsed, and the tunnels leading to Exchange Place station in Jersey City, New Jersey
Jersey City, New Jersey
were flooded with water.[170] The Cortlandt Street station on the New York City Subway's IRT Broadway-Seventh Avenue Line was also within close proximity to the World Trade Center complex, and the entire station, along with the surrounding track, was reduced to rubble.[171] The latter station remains closed, but is due to reopen in December 2018, barring any significant delays.[172] The Pentagon
The Pentagon
was severely damaged by the impact of American Airlines Flight 77 and ensuing fires, causing one section of the building to collapse.[173] As the airplane approached the Pentagon, its wings knocked down light poles and its right engine hit a power generator before crashing into the western side of the building.[174][175] The plane hit the Pentagon at the first-floor level. The front part of the fuselage disintegrated on impact, while the mid and tail sections kept moving for another fraction of a second.[176] Debris from the tail section penetrated furthest into the building, breaking through 310 feet (94 m) of the three outermost of the building's five rings.[176][177] Rescue efforts Main article: Rescue and recovery effort after the September 11 attacks on the World Trade Center

An injured victim of the Pentagon attack is evacuated.

The New York City Fire Department
New York City Fire Department
deployed 200 units (half of the department) to the World Trade Center. Their efforts were supplemented by numerous off-duty firefighters and emergency medical technicians.[178][179][180] The New York City Police Department
New York City Police Department
sent Emergency Service Units and other police personnel and deployed its aviation unit. Once on the scene, the FDNY, the NYPD, and the PAPD did not coordinate efforts and performed redundant searches for civilians.[178][181] As conditions deteriorated, the NYPD aviation unit relayed information to police commanders, who issued orders for its personnel to evacuate the towers; most NYPD officers were able to safely evacuate before the buildings collapsed.[181][182] With separate command posts set up and incompatible radio communications between the agencies, warnings were not passed along to FDNY commanders. After the first tower collapsed, FDNY commanders issued evacuation warnings. Due to technical difficulties with malfunctioning radio repeater systems, many firefighters never heard the evacuation orders. 9-1-1
9-1-1
dispatchers also received information from callers that was not passed along to commanders on the scene.[179] Within hours of the attack, a substantial search, and rescue operation was launched. After months of around-the-clock operations, the World Trade Center site
World Trade Center site
was cleared by the end of May 2002.[183] Aftermath

President George W. Bush
George W. Bush
gets a briefing on the attacks.

Further information: Aftermath of the September 11 attacks, Airport security repercussions due to the September 11 attacks, Closings and cancellations following the September 11 attacks, Reactions to the September 11 attacks, U.S. government response to the September 11 attacks, U.S. military response during the September 11 attacks, and September 11 Victim Compensation Fund The aftermath of the 9/11 attack resulted in immediate responses to the event, including domestic reactions, hate crimes, Muslim American responses to the event, international responses to the attack, and military responses to the events. An extensive compensation program was quickly established by Congress in the aftermath to compensate the victims and families of victims of the 9/11 attack as well.[184][185] Immediate response

Eight hours after the attacks, Donald Rumsfeld, then U.S. Secretary of Defense, declares " The Pentagon
The Pentagon
is functioning."

At 8:32 am FAA officials were notified Flight 11 had been hijacked and they, in turn, notified the North American Aerospace Defense Command (NORAD). NORAD scrambled two F-15s from Otis Air National Guard Base in Massachusetts and they were airborne by 8:53 am.[186] Because of slow and confused communication from FAA officials, NORAD had 9 minutes' notice that Flight 11 had been hijacked, and no notice about any of the other flights before they crashed.[186] After both of the Twin Towers had already been hit, more fighters were scrambled from Langley Air Force Base in Virginia
Virginia
at 9:30 am.[186] At 10:20 am Vice President Dick Cheney
Dick Cheney
issued orders to shoot down any commercial aircraft that could be positively identified as being hijacked. These instructions were not relayed in time for the fighters to take action.[186][187][188][189] Some fighters took to the air without live ammunition, knowing that to prevent the hijackers from striking their intended targets, the pilots might have to intercept and crash their fighters into the hijacked planes, possibly ejecting at the last moment.[190] For the first time in U.S. history, SCATANA was invoked,[191] thus stranding tens of thousands of passengers across the world.[192] The FAA closed American airspace to all international flights, causing about five hundred flights to be turned back or redirected to other countries. Canada received 226 of the diverted flights and launched Operation Yellow Ribbon
Operation Yellow Ribbon
to deal with the large numbers of grounded planes and stranded passengers.[193] The 9/11 attacks had immediate effects on the American people.[194] Police and rescue workers from around the country took leaves of absence, traveling to New York City to help recover bodies from the twisted remnants of the Twin Towers.[195] Blood donations across the U.S. surged in the weeks after 9/11.[196][197] The deaths of adults in the attacks resulted in over 3,000 children losing a parent.[198] Subsequent studies documented children's reactions to these actual losses and to feared losses of life, the protective environment in the aftermath of the attacks, and effects on surviving caregivers.[199][200][201] Domestic reactions

At a joint session of Congress, President George W. Bush
George W. Bush
pledges "to defend freedom against terrorism", September 20, 2001 (audio only).

Following the attacks, President George W. Bush's approval rating soared to 90%.[202] On September 20, 2001, he addressed the nation and a joint session of the United States Congress
United States Congress
regarding the events of September 11 and the subsequent nine days of rescue and recovery efforts, and described his intended response to the attacks. New York City mayor Rudy Giuliani's highly visible role won him high praise in New York and nationally.[203] Many relief funds were immediately set up to assist victims of the attacks, with the task of providing financial assistance to the survivors of the attacks and to the families of victims. By the deadline for victim's compensation on September 11, 2003, 2,833 applications had been received from the families of those who were killed.[204]

Statement by President Bush in his Address to the Nation

George W. Bush's address to the people of the United States, September 11, 2001, 8:30 pm. EDT.

Problems playing this file? See media help.

Contingency plans for the continuity of government and the evacuation of leaders were implemented soon after the attacks.[192] Congress was not told that the United States
United States
had been under a continuity of government status until February 2002.[205] In the largest restructuring of the U.S. government in contemporary history, the United States
United States
enacted the Homeland Security Act
Homeland Security Act
of 2002, creating the Department of Homeland Security. Congress also passed the USA PATRIOT Act, saying it would help detect and prosecute terrorism and other crimes.[206] Civil liberties groups have criticized the PATRIOT Act, saying it allows law enforcement to invade the privacy of citizens and that it eliminates judicial oversight of law enforcement and domestic intelligence.[207][208][209] In an effort to effectively combat future acts of terrorism, the National Security Agency
National Security Agency
(NSA) was given broad powers. NSA
NSA
commenced warrantless surveillance of telecommunications, which was sometimes criticized since it permitted the agency "to eavesdrop on telephone and e-mail communications between the United States
United States
and people overseas without a warrant".[210] In response to requests by various intelligence agencies, the United States Foreign Intelligence Surveillance Court permitted an expansion of powers by the U.S. government in seeking, obtaining, and sharing information on U.S. citizens as well as non-U.S. people from around the world.[211] Hate crimes

A fireman looks up at the remains of the South Tower.

A fireman stands behind rubble.

Shortly after the attacks, President Bush made a public appearance at Washington's largest Islamic Center and acknowledged the "incredibly valuable contribution" that millions of American Muslims made to their country and called for them "to be treated with respect."[212] Numerous incidents of harassment and hate crimes against Muslims and South Asians were reported in the days following the attacks.[213][214][215] Sikhs were also targeted because Sikh
Sikh
males usually wear turbans, which are stereotypically associated with Muslims. There were reports of attacks on mosques and other religious buildings (including the firebombing of a Hindu temple), and assaults on people, including one murder: Balbir Singh Sodhi, a Sikh
Sikh
mistaken for a Muslim, was fatally shot on September 15, 2001, in Mesa, Arizona.[215] According to an academic study, people perceived to be Middle Eastern were as likely to be victims of hate crimes as followers of Islam during this time. The study also found a similar increase in hate crimes against people who may have been perceived as Muslims, Arabs, and others thought to be of Middle Eastern origin.[216] A report by the South Asian American advocacy group known as South Asian Americans Leading Together, documented media coverage of 645 bias incidents against Americans of South Asian or Middle Eastern descent between September 11 and 17. Various crimes such as vandalism, arson, assault, shootings, harassment, and threats in numerous places were documented.[217][218] Muslim American response Muslim organizations in the United States
United States
were swift to condemn the attacks and called "upon Muslim Americans
Muslim Americans
to come forward with their skills and resources to help alleviate the sufferings of the affected people and their families".[219] These organizations included the Islamic Society of North America, American Muslim Alliance, American Muslim Council, Council on American-Islamic Relations, Islamic Circle of North America, and the Shari'a Scholars Association of North America. Along with monetary donations, many Islamic organizations launched blood drives and provided medical assistance, food, and shelter for victims.[220][221][222] International reactions Main article: Reactions to the September 11 attacks The attacks were denounced by mass media and governments worldwide. Across the globe, nations offered pro-American support and solidarity.[223] Leaders in most Middle Eastern countries, and Afghanistan, condemned the attacks. Iraq
Iraq
was a notable exception, with an immediate official statement that, "the American cowboys are reaping the fruit of their crimes against humanity".[224] The government of Saudi Arabia
Saudi Arabia
officially condemned the attacks, but privately many Saudis favored bin Laden's cause.[225][226] Although Palestinian Authority
Palestinian Authority
(PA) president Yasser Arafat
Yasser Arafat
also condemned the attacks, there were reports of celebrations in the West Bank, Gaza Strip, and East Jerusalem—with a celebration involving 3,000 Palestinians dancing in the streets and handing out candy being filmed in Nablus
Nablus
despite alleged PA warnings that it could not guarantee the safety of journalists attempting to document the event. Similar demonstrations took place in Amman, Jordan, where there is a large population of Palestinian descent.[227] As in the United States, the aftermath of the attacks saw tensions increase in other countries between Muslims and non-Muslims.[228] United Nations Security Council Resolution 1368
United Nations Security Council Resolution 1368
condemned the attacks, and expressed readiness to take all necessary steps to respond and combat all forms of terrorism in accordance with their Charter.[229] Numerous countries introduced anti-terrorism legislation and froze bank accounts they suspected of al-Qaeda ties.[230][231] Law enforcement and intelligence agencies in a number of countries arrested alleged terrorists.[232][233] British Prime Minister Tony Blair
Tony Blair
said Britain stood "shoulder to shoulder" with the United States.[234] A few days later, Blair flew to Washington to affirm British solidarity with the United States. In a speech to Congress, nine days after the attacks, which Blair attended as a guest, President Bush declared "America has no truer friend than Great Britain."[235] Subsequently, Prime Minister Blair embarked on two months of diplomacy to rally international support for military action; he held 54 meetings with world leaders and travelled more than 40,000 miles (60,000 km).[236]

Vladimir Putin
Vladimir Putin
and his wife attending a commemoration service for the victims of the September 11 attacks on November 16, 2001

Tens of thousands of people attempted to flee Afghanistan
Afghanistan
following the attacks, fearing a response by the United States. Pakistan, already home to many Afghan refugees from previous conflicts, closed its border with Afghanistan
Afghanistan
on September 17, 2001. Approximately one month after the attacks, the United States
United States
led a broad coalition of international forces to overthrow the Taliban
Taliban
regime from Afghanistan for their harboring of al-Qaeda.[237] Though Pakistani authorities were initially reluctant to align themselves with the United States against the Taliban, they permitted the coalition access to their military bases, and arrested and handed over to the U.S. over 600 suspected al-Qaeda members.[238][239] The U.S. set up the Guantanamo Bay detention camp
Guantanamo Bay detention camp
to hold inmates they defined as "illegal enemy combatants". The legitimacy of these detentions has been questioned by the European Union
European Union
and human rights organizations.[240][241][242] On September 25, 2001, Iran's fifth president, Mohammad Khatami meeting British Foreign Secretary, Jack Straw, said: " Iran
Iran
fully understands the feelings of the Americans about the terrorist attacks in New York and Washington on September 11." He said although the American administrations had been at best indifferent about terrorist operations in Iran
Iran
(since 1979), the Iranians instead felt differently and had expressed their sympathetic feelings with bereaved Americans in the tragic incidents in the two cities. He also stated that "Nations should not be punished in place of terrorists." [243] According to Radio Farda's website, when the attacks' news was released, some Iranian citizens gathered in front of the Embassy of Switzerland in Tehran, which serves as the protecting power of the United States
United States
in Iran
Iran
(US interests protecting office in Iran), to express their sympathy and some of them lit candles as a symbol of mourning. This piece of news at Radio Farda's website also states that in 2011, on the anniversary of the attacks, United States
United States
Department of State, published a post at its blog, in which the Department thanked Iranian people for their sympathy and stated that they would never forget Iranian people's kindness on those harsh days.[244] After the attacks, both the President[245][246] and the Supreme Leader of Iran, condemned the attacks. The BBC
BBC
and Time magazine published reports on holding candlelit vigils for the victims by Iranian citizens at their websites.[247][248] According to Politico
Politico
Magazine, following the attacks, Sayyed Ali Khamenei, the Supreme Leader of Iran, "suspended the usual 'Death to America' chants at Friday prayers" temporarily.[249] In a speech by the Nizari
Nizari
Ismaili Imam at the Nobel Institute in 2005, Aga Khan IV
Aga Khan IV
stated that the "9/11 attack on the United States
United States
was a direct consequence of the international community ignoring the human tragedy that was Afghanistan
Afghanistan
at that time".[250] Military operations See also: War on Terror At 2:40 p.m. in the afternoon of September 11, Secretary of Defense Donald Rumsfeld
Donald Rumsfeld
was issuing rapid orders to his aides to look for evidence of Iraqi involvement. According to notes taken by senior policy official Stephen Cambone, Rumsfeld asked for, "Best info fast. Judge whether good enough hit S.H." (Saddam Hussein) "at same time. Not only UBL" (Osama bin Laden).[251] Cambone's notes quoted Rumsfeld as saying, "Need to move swiftly – Near term target needs – go massive – sweep it all up. Things related and not."[252][253] In a meeting at Camp David
Camp David
on September 15 the Bush administration rejected the idea of attacking Iraq
Iraq
in response to 9/11.[254] Nonetheless, they later invaded the country with allies, citing "Saddam Hussein's support for terrorism".[255] At the time, as many as 7 in 10 Americans believed the Iraqi president played a role in the 9/11 attacks.[256] Three years later, Bush conceded that he had not.[257]

U.S. soldiers in Afghanistan

The NATO
NATO
council declared the attacks on the United States
United States
were an attack on all NATO
NATO
nations which satisfied Article 5 of the NATO charter. This marked the first invocation of Article 5, which had been written during the Cold War
Cold War
with an attack by the Soviet
Soviet
Union in mind.[258] Australian Prime Minister John Howard
John Howard
who was in Washington D.C. during the attacks invoked Article IV of the ANZUS
ANZUS
treaty.[259] The Bush administration announced a War on Terror, with the stated goals of bringing bin Laden and al-Qaeda to justice and preventing the emergence of other terrorist networks.[260] These goals would be accomplished by imposing economic and military sanctions against states harboring terrorists, and increasing global surveillance and intelligence sharing.[261] On September 14, 2001, the U.S. Congress passed the Authorization for Use of Military Force Against Terrorists. Still, in effect, it grants the President the authority to use all "necessary and appropriate force" against those whom he determined "planned, authorized, committed or aided" the September 11 attacks, or who harbored said persons or groups.[262] On October 7, 2001, the War in Afghanistan
Afghanistan
began when U.S. and British forces initiated aerial bombing campaigns targeting Taliban
Taliban
and al-Qaeda camps, then later invaded Afghanistan
Afghanistan
with ground troops of the Special
Special
Forces.[263] This eventually led to the overthrow of the Taliban
Taliban
rule of Afghanistan
Afghanistan
with the Fall of Kandahar
Fall of Kandahar
on December 7, 2001, by U.S. led coalition forces.[264] Conflict in Afghanistan between the Taliban
Taliban
insurgency and the Afghan forces backed by NATO Resolute Support Mission
Resolute Support Mission
is ongoing. The Philippines
Philippines
and Indonesia, among other nations with their own internal conflicts with Islamic terrorism, also increased their military readiness.[265][266] The military forces of the United States
United States
of America and the Islamic Republic of Iran
Iran
cooperated with each other to overthrow the Taliban regime which had had conflicts with the government of Iran.[249] Iran's Quds Force
Quds Force
helped US forces and Afghan rebels in the 2001 uprising in Herat.[267][268] Effects Health issues Main article: Health effects arising from the September 11 attacks

Survivors were covered in dust after the collapse of the towers.

Hundreds of thousands of tons of toxic debris containing more than 2,500 contaminants, including known carcinogens, were spread across Lower Manhattan
Lower Manhattan
due to the collapse of the Twin Towers.[269][270] Exposure to the toxins in the debris is alleged to have contributed to fatal or debilitating illnesses among people who were at ground zero.[271][272] The Bush administration ordered the Environmental Protection Agency (EPA) to issue reassuring statements regarding air quality in the aftermath of the attacks, citing national security, but the EPA did not determine that air quality had returned to pre- September 11 levels until June 2002.[273] Health effects extended to residents, students, and office workers of Lower Manhattan
Lower Manhattan
and nearby Chinatown.[274] Several deaths have been linked to the toxic dust, and the victims' names were included in the World Trade Center memorial.[275] Approximately 18,000 people have been estimated to have developed illnesses as a result of the toxic dust.[276] There is also scientific speculation that exposure to various toxic products in the air may have negative effects on fetal development. A notable children's environmental health center is currently analyzing the children whose mothers were pregnant during the WTC collapse, and were living or working nearby.[277] A study of rescue workers released in April 2010 found that all those studied had impaired lung functions and that 30–40% were reporting little or no improvement in persistent symptoms that started within the first year of the attack.[278] Years after the attacks, legal disputes over the costs of illnesses related to the attacks were still in the court system. On October 17, 2006, a federal judge rejected New York City's refusal to pay for health costs for rescue workers, allowing for the possibility of numerous suits against the city.[279] Government officials have been faulted for urging the public to return to lower Manhattan in the weeks shortly after the attacks. Christine Todd Whitman, administrator of the EPA in the aftermath of the attacks, was heavily criticized by a U.S. District Judge for incorrectly saying that the area was environmentally safe.[280] Mayor Giuliani was criticized for urging financial industry personnel to return quickly to the greater Wall Street area.[281] The United States Congress
United States Congress
passed the James L. Zadroga 9/11 Health and Compensation Act on December 22, 2010, and President Barack Obama signed the act into law on January 2, 2011. It allocated $4.2 billion to create the World Trade Center Health Program, which provides testing and treatment for people suffering from long-term health problems related to the 9/11 attacks.[282][283] The WTC Health Program replaced preexisting 9/11-related health programs such as the Medical Monitoring and Treatment Program and the WTC Environmental Health Center program.[283] Economic Main article: Economic effects arising from the September 11 attacks

As shown in this table, the 9/11 attacks had a major effect on the economy of New York City (in red), compared to the United States' economy overall (in blue).

The attacks had a significant economic impact on United States
United States
and world markets.[284] The stock exchanges did not open on September 11 and remained closed until September 17. Reopening, the Dow Jones Industrial Average (DJIA) fell 684 points, or 7.1%, to 8921, a record-setting one-day point decline.[285] By the end of the week, the DJIA had fallen 1,369.7 points (14.3%), at the time its largest one-week point drop in history.[286] In 2001 dollars, U.S. stocks lost $1.4 trillion in valuation for the week.[286] In New York City, about 430,000 job-months and $2.8 billion dollars in wages were lost in the first three months after the attacks. The economic effects were mainly on the economy's export sectors.[287] The city's GDP was estimated to have declined by $27.3 billion for the last three months of 2001 and all of 2002. The U.S. government provided $11.2 billion in immediate assistance to the Government of New York City
Government of New York City
in September 2001, and $10.5 billion in early 2002 for economic development and infrastructure needs.[288] Also hurt were small businesses in Lower Manhattan
Lower Manhattan
near the World Trade Center, 18,000 of which were destroyed or displaced, resulting in lost jobs and their consequent wages. Assistance was provided by Small Business Administration
Small Business Administration
loans, federal government Community Development Block Grants, and Economic Injury Disaster Loans.[288] Some 31,900,000 square feet (2,960,000 m2) of Lower Manhattan office space was damaged or destroyed.[289] Many wondered whether these jobs would return, and if the damaged tax base would recover.[290] Studies of the economic effects of 9/11 show the Manhattan office real-estate market and office employment were less affected than first feared, because of the financial services industry's need for face-to-face interaction.[291][292] North American air space was closed for several days after the attacks and air travel decreased upon its reopening, leading to a nearly 20% cutback in air travel capacity, and exacerbating financial problems in the struggling U.S. airline industry.[293]

U.S. deficit and debt increases 2001–08

The September 11 attacks also led to the U.S. wars in Afghanistan
Afghanistan
and Iraq,[294] as well as additional homeland security spending, totaling at least $5 trillion.[295] Cultural influence Main article: Cultural influence of 9/11 The impact of 9/11 extends beyond geopolitics into society and culture in general. Immediate responses to 9/11 included greater focus on home life and time spent with family, higher church attendance, and increased expressions of patriotism such as the flying of flags.[296] The radio industry responded by removing certain songs from playlists, and the attacks have subsequently been used as background, narrative or thematic elements in film, television, music and literature. Already-running television shows as well as programs developed after 9/11 have reflected post-9/11 cultural concerns.[297] 9/11 conspiracy theories have become social phenomena, despite lack of support from expert scientists, engineers, and historians.[298] 9/11 has also had a major impact on the religious faith of many individuals; for some it strengthened, to find consolation to cope with the loss of loved ones and overcome their grief; others started to question their faith or lost it entirely, because they could not reconcile it with their view of religion.[299][300] The culture of America succeeding the attacks is noted for heightened security and an increased demand thereof, as well as paranoia and anxiety regarding future terrorist attacks that includes most of the nation. Psychologists have also confirmed that there has been an increased amount of national anxiety in commercial air travel.[301] Government policies toward terrorism As a result of the attacks, many governments across the world passed legislation to combat terrorism.[302] In Germany, where several of the 9/11 terrorists had resided and taken advantage of that country's liberal asylum policies, two major anti-terrorism packages were enacted. The first removed legal loopholes that permitted terrorists to live and raise money in Germany. The second addressed the effectiveness and communication of intelligence and law enforcement.[303] Canada passed the Canadian Anti- Terrorism
Terrorism
Act, that nation's first anti-terrorism law.[304] The United Kingdom
United Kingdom
passed the Anti-terrorism, Crime and Security Act 2001
Anti-terrorism, Crime and Security Act 2001
and the Prevention of Terrorism
Terrorism
Act 2005.[305][306] New Zealand enacted the Terrorism Suppression Act 2002.[307] In the United States, the Department of Homeland Security
Department of Homeland Security
was created by the Homeland Security Act
Homeland Security Act
to coordinate domestic anti-terrorism efforts. The USA Patriot Act
USA Patriot Act
gave the federal government greater powers, including the authority to detain foreign terror suspects for a week without charge, to monitor telephone communications, e-mail, and Internet use by terror suspects, and to prosecute suspected terrorists without time restrictions. The FAA ordered that airplane cockpits be reinforced to prevent terrorists gaining control of planes, and assigned sky marshals to flights. Further, the Aviation and Transportation Security Act made the federal government, rather than airports, responsible for airport security. The law created the Transportation Security Administration
Transportation Security Administration
to inspect passengers and luggage, causing long delays and concern over passenger privacy.[308] After suspected abuses of the USA Patriot Act
USA Patriot Act
were brought to light in June 2013 with articles about collection of American call records by the NSA
NSA
and the PRISM program (see 2013 mass surveillance disclosures), Representative Jim Sensenbrenner, Republican of Wisconsin, who introduced the Patriot Act
Patriot Act
in 2001, said that the National Security Agency
National Security Agency
overstepped its bounds.[309][310] Investigations FBI Immediately after the attacks, the Federal Bureau of Investigation started PENTTBOM, the largest criminal inquiry in the history of the United States. At its height, more than half of the FBI's agents worked on the investigation and followed a half-million leads.[311] The FBI concluded that there was "clear and irrefutable" evidence linking al-Qaeda and bin Laden to the attacks.[312]

Mohamed Atta, an Egyptian national, was the ringleader of the hijackers.

The FBI was quickly able to identify the hijackers, including leader Mohamed Atta, when his luggage was discovered at Boston's Logan Airport. Atta had been forced to check two of his three bags due to space limitations on the 19-seat commuter flight he took to Boston. Due to a new policy instituted to prevent flight delays, the luggage failed to make it aboard American Airlines Flight 11
American Airlines Flight 11
as planned. The luggage contained the hijackers' names, assignments, and al-Qaeda connections. "It had all these Arab-language (sic) papers that amounted to the Rosetta stone of the investigation", said one FBI agent.[313] Within hours of the attacks, the FBI released the names and in many cases the personal details of the suspected pilots and hijackers.[314][315] On September 27, 2001, they released photos of all 19 hijackers, along with information about possible nationalities and aliases.[316] Fifteen of the men were from Saudi Arabia, two from the United Arab Emirates, one from Egypt, and one from Lebanon.[317] By midday, the U.S. National Security Agency
National Security Agency
and German intelligence agencies had intercepted communications pointing to Osama bin Laden.[318] Two of the hijackers were known to have travelled with a bin Laden associate to Malaysia
Malaysia
in 2000[319] and hijacker Mohammed Atta had previously gone to Afghanistan.[320] He and others were part of a terrorist cell in Hamburg.[321] One of the members of the Hamburg cell was discovered to have been in communication with Khalid Sheik Mohammed who was identified as a member of al-Qaeda.[322] Authorities in the United States
United States
and Britain also obtained electronic intercepts, including telephone conversations and electronic bank transfers, which indicate that Mohammed Atef, a bin Laden deputy, was a key figure in the planning of the 9/11 attacks. Intercepts were also obtained that revealed conversations that took place days before September 11 between bin Laden and an associate in Pakistan. In those conversations, the two referred to "an incident that would take place in America on, or around, September 11" and they discussed potential repercussions. In another conversation with an associate in Afghanistan, bin Laden discussed the "scale and effects of a forthcoming operation." These conversations did not specifically mention the World Trade Center or Pentagon, or other specifics.[323]

Origins of the 19 hijackers

Nationality Number

Saudi Arabia

15

United Arab Emirates

2

Egypt

1

Lebanon

1

CIA The Inspector General of the Central Intelligence Agency
Central Intelligence Agency
(CIA) conducted an internal review of the agency's pre-9/11 performance and was harshly critical of senior CIA officials for not doing everything possible to confront terrorism. He criticized their failure to stop two of the 9/11 hijackers, Nawaf al-Hazmi
Nawaf al-Hazmi
and Khalid al-Mihdhar, as they entered the United States
United States
and their failure to share information on the two men with the FBI.[324] In May 2007, senators from both major U.S. political parties drafted legislation to make the review public. One of the backers, Senator Ron Wyden
Ron Wyden
said, "The American people have a right to know what the Central Intelligence Agency
Central Intelligence Agency
was doing in those critical months before 9/11."[325] Congressional inquiry Main article: Joint Inquiry into Intelligence Community Activities before and after the Terrorist Attacks of September 11, 2001 In February 2002, the Senate Select Committee on Intelligence
Senate Select Committee on Intelligence
and the House Permanent Select Committee on Intelligence
House Permanent Select Committee on Intelligence
formed a joint inquiry into the performance of the U.S. Intelligence Community.[326] Their 832-page report released in December 2002[327] detailed failings of the FBI and CIA to use available information, including about terrorists the CIA knew were in the United States, in order to disrupt the plots.[328] The joint inquiry developed its information about possible involvement of Saudi Arabian government officials from non-classified sources.[329] Nevertheless, the Bush administration demanded 28 related pages remain classified.[328] In December 2002, the inquiry's chair Bob Graham
Bob Graham
(D-FL) revealed in an interview that there was "evidence that there were foreign governments involved in facilitating the activities of at least some of the terrorists in the United States."[330] September 11 victim families were frustrated by the unanswered questions and redacted material from the Congressional inquiry and demanded an independent commission.[328] September 11 victim families,[331] members of congress[332][333] and the Saudi Arabian government are still seeking release of the documents.[334][335] In June 2016, CIA chief John Brennan says that he believes 28 redacted pages of a congressional inquiry into 9/11 will soon be made public and that they will prove that the government of Saudi Arabia
Saudi Arabia
had no involvement in the September 11 attacks.[336] In September 2016, the Congress passed the Justice Against Sponsors of Terrorism
Terrorism
Act that would allow relatives of victims of the September 11 attacks to sue Saudi Arabia
Saudi Arabia
for its government's alleged role in the attacks.[337][338][339] 9/11 Commission Main articles: 9/11 Commission, 9/11 Commission
9/11 Commission
Report, and Criticism of the 9/11 Commission The National Commission on Terrorist Attacks Upon the United States (9/11 Commission), chaired by Thomas Kean
Thomas Kean
and Lee H. Hamilton, was formed in late 2002 to prepare a thorough account of the circumstances surrounding the attacks, including preparedness for and the immediate response to the attacks.[340] On July 22, 2004, the Commission issued the 9/11 Commission
9/11 Commission
Report. The report detailed the events of 9/11, found the attacks were carried out by members of al-Qaeda and examined how security and intelligence agencies were inadequately coordinated to prevent the attacks. Formed from an independent bipartisan group of mostly former Senators, Representatives, and Governors, the commissioners explained, "We believe the 9/11 attacks revealed four kinds of failures: in imagination, policy, capabilities, and management".[341] The Commission made numerous recommendations on how to prevent future attacks, and in 2011 was dismayed that several of its recommendations had yet to be implemented.[342] National Institute of Standards and Technology Main article: The NIST World Trade Center Disaster Investigation See also: 7 World Trade Center
7 World Trade Center
§ 9/11 and collapse

The exterior support columns from the lower level of the south tower remained standing after the building collapsed.

The U.S. National Institute of Standards and Technology
National Institute of Standards and Technology
(NIST) investigated the collapses of the Twin Towers and 7 WTC. The investigations examined why the buildings collapsed and what fire protection measures were in place, and evaluated how fire protection systems might be improved in future construction.[343] The investigation into the collapse of 1 WTC and 2 WTC was concluded in October 2005 and that of 7 WTC was completed in August 2008.[344] NIST found that the fireproofing on the Twin Towers' steel infrastructures was blown off by the initial impact of the planes and that, had this not occurred, the towers likely would have remained standing.[345] A 2007 study of the north tower's collapse published by researchers of Purdue University
Purdue University
determined that, since the plane's impact had stripped off much of the structure's thermal insulation, the heat from a typical office fire would have softened and weakened the exposed girders and columns enough to initiate the collapse regardless of the number of columns cut or damaged by the impact.[346][347] The director of the original investigation stated that "the towers really did amazingly well. The terrorist aircraft didn't bring the buildings down; it was the fire which followed. It was proven that you could take out two-thirds of the columns in a tower and the building would still stand."[348] The fires weakened the trusses supporting the floors, making the floors sag. The sagging floors pulled on the exterior steel columns causing the exterior columns to bow inward. With the damage to the core columns, the buckling exterior columns could no longer support the buildings, causing them to collapse. Additionally, the report found the towers' stairwells were not adequately reinforced to provide adequate emergency escape for people above the impact zones.[349] NIST concluded that uncontrolled fires in 7 WTC caused floor beams and girders to heat and subsequently "caused a critical support column to fail, initiating a fire-induced progressive collapse that brought the building down".[344] Rebuilding

Rebuilt One World Trade Center
One World Trade Center
nearing completion in July 2013

Further information: World Trade Center site, World Trade Center (2001–present), Construction of One World Trade Center, and One World Trade Center On the day of the attacks, New York City mayor Rudy Giuliani
Rudy Giuliani
stated: "We will rebuild. We're going to come out of this stronger than before, politically stronger, economically stronger. The skyline will be made whole again."[350] The damaged section of the Pentagon was rebuilt and occupied within a year of the attacks.[351] The temporary World Trade Center PATH station opened in late 2003 and construction of the new 7 World Trade Center was completed in 2006. Work on rebuilding the main World Trade Center site was delayed until late 2006 when leaseholder Larry Silverstein and the Port Authority of New York and New Jersey agreed on financing.[352] The construction of One World Trade Center
One World Trade Center
began on April 27, 2006, and reached its full height on May 20, 2013. The spire was installed atop the building at that date, putting 1 WTC's height at 1,776 feet (541 m) and thus claiming the title of the tallest building in the Western Hemisphere.[353] One WTC finished construction and opened on November 3, 2014.[5][354] On the World Trade Center site, three more office towers are expected to be built one block east of where the original towers stood. Construction has begun on all three of these towers.[355] Memorials Main article: Memorials and services for the September 11 attacks

The Tribute in Light
Tribute in Light
on September 11, 2014, on the thirteenth anniversary of the attacks, seen from Bayonne, New Jersey. The tallest building in the picture is the new One World Trade Center.

In the days immediately following the attacks, many memorials and vigils were held around the world, and photographs of the dead and missing were posted around Ground Zero. A witness described being unable to "get away from faces of innocent victims who were killed. Their pictures are everywhere, on phone booths, street lights, walls of subway stations. Everything reminded me of a huge funeral, people quiet and sad, but also very nice. Before, New York gave me a cold feeling; now people were reaching out to help each other."[356] One of the first memorials was the Tribute in Light, an installation of 88 searchlights at the footprints of the World Trade Center towers.[357] In New York City, the World Trade Center Site Memorial Competition was held to design an appropriate memorial on the site.[358] The winning design, Reflecting Absence, was selected in August 2006, and consists of a pair of reflecting pools in the footprints of the towers, surrounded by a list of the victims' names in an underground memorial space.[359] The memorial was completed on September 11, 2011;[360] a museum also opened on site on May 21, 2014.[361] In Arlington County, The Pentagon
The Pentagon
Memorial was completed and opened to the public on the seventh anniversary of the attacks in 2008.[362][363] It consists of a landscaped park with 184 benches facing the Pentagon.[364] When the Pentagon was repaired in 2001–2002, a private chapel and indoor memorial were included, located at the spot where Flight 77 crashed into the building.[365] In Shanksville, a concrete and glass visitor center was opened on September 10, 2015,[366] situated on a hill overlooking the crash site and the white marble Wall of Names.[367] An observation platform at the visitor center and the white marble wall are both aligned beneath the path of Flight 93.[367][368] A temporary memorial is located 500 yards (457 m) from the crash site.[369] New York City firefighters donated a cross made of steel from the World Trade Center and mounted on top of a platform shaped like the Pentagon.[370] It was installed outside the firehouse on August 25, 2008.[371] Many other permanent memorials are elsewhere. Scholarships and charities have been established by the victims' families, and by many other organizations and private figures.[372] On every anniversary, in New York City, the names of the victims who died there are read out against a background of somber music. The President of the United States
United States
attends a memorial service at the Pentagon,[373] and asks Americans to observe Patriot Day
Patriot Day
with a moment of silence. Smaller services are held in Shanksville, Pennsylvania, which are usually attended by the President's spouse.

See also

Book: September 11 attacks

Alleged Saudi role in September 11 attacks Bojinka plot
Bojinka plot
– plot by Ramzi Yousef
Ramzi Yousef
and Khalid Shaikh Mohammed, foiled in 1995, to attack multiple airliners and crash a plane into the CIA headquarters Federal Express Flight 705
Federal Express Flight 705
– 1994 cockpit attack Air France Flight 8969
Air France Flight 8969
– a plane hijacked by terrorists intended to be crashed into the Eiffel Tower Outline of the September 11 attacks List of major terrorist incidents September 11th Victim Compensation Fund Terrorism
Terrorism
in the United States The 28 Pages

September 11 attacks portal Terrorism
Terrorism
portal Disasters portal 2000s portal New York City portal United States
United States
portal

Notes

^ The expression "9/11" is pronounced "nine eleven". The slash is not part of the pronunciation. The name is frequently used in British English as well as in American English, even though the dating conventions differ.

References Citations

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leader Osama bin Laden appeared in a new message aired on an Arabic TV station Friday night, for the first time claiming direct responsibility for the 2001 attacks against the United States.  ^ "How much did the September 11 terrorist attack cost America?". 2004. Institute for the Analysis of Global Security. Retrieved April 30, 2014.  ^ a b Matthew J. Morgan (August 4, 2009). The Impact of 9/11 on Politics and War: The Day that Changed Everything?. Palgrave Macmillan. p. 222. ISBN 0-230-60763-2.  ^ Congress. Congressional Record, Vol. 148, Pt. 7, May 23, 2002 to June 12, 2002. Government Printing Office. p. 9909. ISBN 978-0-16-076125-6. Retrieved April 9, 2014.  ^ a b Moore, Jack (November 3, 2014). "World Trade Center Re-opens as Tallest Building in America". International Business Times. One World Trade Center. Archived from the original on September 4, 2015. Retrieved September 11, 2015.  ^ Smith, Aaron (November 3, 2014). " One World Trade Center
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opens today". CNN. Retrieved November 4, 2014.  ^ "Al-Qaeda's origins and links". BBC
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News. July 20, 2004. Retrieved September 3, 2011.  ^ Gunaratna (2002), pp. 23–33. ^ "Bin Laden's fatwā (1996)". PBS. Archived from the original on October 31, 2001. Retrieved May 29, 2014.  ^ a b c d "Al Qaeda's Second Fatwa". PBS
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NewsHour. Public Broadcasting Service. Archived from the original on November 28, 2013. Retrieved May 29, 2014.  ^ " Pakistan
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to Demand Taliban
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Seals Afghan Border". Fox News Channel. September 16, 2001. Retrieved September 3, 2011.  ^ "Bin Laden on tape: Attacks 'benefited Islam greatly'". CNN. December 14, 2001. Archived from the original on December 27, 2007. Retrieved November 24, 2013. Reveling in the details of the fatal attacks, bin Laden brags in Arabic that he knew about them beforehand and says the destruction went beyond his hopes. He says the attacks "benefited Islam greatly".  ^ "Transcript: Bin Laden video excerpts". BBC
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News. December 27, 2001. Retrieved September 3, 2011.  ^ Michael, Maggie (October 29, 2004). "Bin Laden, in statement to U.S. people, says he ordered Sept. 11 attacks". SignOnSanDiego.com. Associated Press. Retrieved September 3, 2011.  ^ "Al-Jazeera: Bin Laden tape obtained in Pakistan". MSNBC. October 30, 2004. Retrieved September 3, 2011.  ^ "Bin Laden 9/11 planning video aired". CBC News. September 7, 2006. Archived from the original on October 13, 2007. Retrieved September 3, 2011.  ^ Clewley, Robin (September 27, 2001). "How Osama Cracked FBI's Top 10". Wired. Archived from the original on May 26, 2008. Retrieved May 29, 2014.  ^ "USAMA BIN LADEN". FBI Ten Most Wanted Fugitive. Federal Bureau of Investigation. Retrieved September 10, 2011.  ^ Baker, Peter; Cooper, Helene (May 1, 2011). "Bin Laden Is Dead, President Obama Says". The New York Times. Retrieved September 3, 2011.  ^ Cooper, Helene (May 1, 2011). "Obama Announces Killing of Osama bin Laden". The New York Times. Retrieved September 3, 2011.  ^ "We left out nuclear targets, for now". The Guardian. London. March 4, 2003. Archived from the original on January 23, 2008. Retrieved September 3, 2011. Yosri Fouda of the Arabic television channel al-Jazeera is the only journalist to have interviewed Khalid Sheikh Mohammed, the al-Qaeda military commander arrested at the weekend. Here he describes the two-day encounter with him and his fellow organiser of September 11, Ramzi bin al- Shibh: […] Summoning every thread of experience and courage, I looked Khalid in the eye and asked: 'Did you do it?' The reference to September 11 was implicit. Khalid responded with little fanfare: 'I am the head of the al-Qaeda military committee,' he began, 'and Ramzi is the coordinator of the Holy Tuesday operation. And yes, we did it.'  ^ Leonard, Tom; Spillius, Alex (October 10, 2008). "Alleged 9/11 mastermind wants to confess to plot". The Daily Telegraph. London. Retrieved September 3, 2011.  ^ a b " September 11 suspect 'confesses'". Al Jazeera. March 15, 2007. Retrieved September 3, 2011.  ^ 9/11 Commission Report
9/11 Commission Report
(2004), p. 147. ^ " White House
White House
power grabs". The Washington Times. August 26, 2009. Retrieved September 3, 2011.  ^ Van Voris, Bob; Hurtado, Patricia (April 4, 2011). "Khalid Sheikh Mohammed Terror Indictment Unsealed, Dismissed". Bloomberg BusinessWeek. Archived from the original on April 17, 2011. Retrieved September 3, 2011.  ^ Shannon, Elaine; Weisskopf, Michael (March 24, 2003). "Khalid Sheikh Mohammed Names Names". Time. Retrieved September 3, 2011.  ^ Nichols, Michelle (May 8, 2008). "US judge orders CIA to turn over 'torture' memo-ACLU". Reuters. Retrieved September 3, 2011.  ^ " Khalid Sheikh Mohammed
Khalid Sheikh Mohammed
'asked to design' vacuum cleaner". BBC
BBC
News. July 11, 2013. Retrieved September 10, 2017.  ^ "Key 9/11 suspect 'admits guilt'". BBC
BBC
News. March 15, 2007. Retrieved April 10, 2012.  ^ "Substitution for Testimony of Khalid Sheikh Mohammed" (PDF). United States District Court for the Eastern District of Virginia. 2006. p. 24. Retrieved September 3, 2011.  ^ "Spain jails 18 al-Qaeda operatives". The Age. Melbourne. September 27, 2005. Retrieved September 3, 2011.  ^ Naughton, Philippe (June 1, 2006). "Spanish court quashes 9/11 conviction". The Times. Retrieved September 3, 2011.  ^ Summers and Swan (2011), p. 489n. ^ Youssef, Maamoun (May 24, 2006). "Bin Laden: Moussaoui Not Linked to 9/11". The Washington Post. Associated Press.  ^ Summers and Swan (2011), p. 542n. ^ "The Hamburg
Hamburg
connection". BBC
BBC
News. August 19, 2005.  ^ "Chapter of the 9/11 Commission Report
9/11 Commission Report
detailing the history of the Hamburg
Hamburg
Cell Archived August 16, 2009, at the Wayback Machine.". 9/11 Commission. ^ Gunarathna, pp. 61–62. ^ bin Laden, Osama (November 24, 2002). "Full text: bin Laden's 'letter to America'". The Observer. London. Retrieved September 3, 2011.  ^ a b * Mearsheimer (2007), p. 67.

Kushner (2003), p. 389. Murdico (2003), p. 64. Kelley (2006), p. 207. Ibrahim (2007), p. 276. Berner (2007), p. 80.

^ Plotz, David (2001) What Does Osama Bin Laden Want? Archived November 15, 2016, at the Wayback Machine., Slate ^ * Plotz, David (2001) What Does Osama Bin Laden Want?, Slate

Bergen (2001), p. 3. Yusufzai, Rahimullah (September 26, 2001). "Face to face with Osama". The Guardian. London. Archived from the original on January 19, 2008. Retrieved September 3, 2011.  "US pulls out of Saudi Arabia". BBC
BBC
News. April 29, 2003. Retrieved September 3, 2011.  "Saga of Dr. Zawahri Sheds Light on the Roots of al Qaeda Terror". The Wall Street
Wall Street
Journal. July 2, 2002. Retrieved September 3, 2011.  "Tenth Public Hearing, Testimony of Louis Freeh". 9/11 Commission. April 13, 2004. Retrieved September 3, 2011.  " Jihad
Jihad
Against Jews and Crusaders: World Islamic Front Statement". Federation of American Scientists. February 23, 1998. Retrieved September 3, 2011. 

^ * "Full transcript of bin Ladin's speech". Al Jazeera. Archived from the original on January 1, 2016. Retrieved April 10, 2012. 

bin Laden, Osama (November 24, 2002). "Full text: bin Laden's 'letter to America'". The Observer. London. Retrieved September 3, 2011. 

^ "Full transcript of bin Laden's "Letter to America"". The Guardian. London. November 24, 2002. Retrieved September 3, 2011.  ^ bin Laden, Osama. "Full transcript of bin Ladin's speech". Al Jazeera. Archived from the original on January 1, 2016. Retrieved April 10, 2012. So I shall talk to you about the story behind those events and shall tell you truthfully about the moments in which the decision was taken, for you to consider  ^ Bergen (2001), p. 3. ^ a b c "1998 Al Qaeda fatwā". Fas.org. February 23, 1998. Retrieved September 3, 2011.  ^ a b Yusufzai, Rahimullah (September 26, 2001). "Face to face with Osama". The Guardian. London. Retrieved September 3, 2011.  ^ Pape, Robert A. (2005). Dying to Win: The Strategic Logic of Suicide Terrorism. New York: Random House. ISBN 0-8129-7338-0.  ^ See also the 1998 Al-Qaeda
Al-Qaeda
fatwā: "The ruling to kill the Americans and their allies – civilians and military – is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque [Mecca] from their grip, and in order for their armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim." Quoted from "Al Qaeda's Second Fatwa". PBS
PBS
NewsHour. Public Broadcasting Service. Archived from the original on November 28, 2013. Retrieved May 29, 2014.  ^ Summers and Swan (2011), pp. 211, 506n. ^ Lawrence (2005), p. 239. ^ "Full transcript of bin Ladin's speech". Al Jazeera. November 4, 2004. Retrieved August 24, 2016.  ^ In his taped broadcast from January 2010, Bin Laden said "Our attacks against you [the United States] will continue as long as U.S. support for Israel
Israel
continues. … The message sent to you with the attempt by the hero Nigerian Umar Farouk Abdulmutallab
Umar Farouk Abdulmutallab
is a confirmation of our previous message conveyed by the heroes of September 11". Quoted from "Bin Laden: Attacks on U.S. to go on as long as it supports Israel" Archived December 16, 2016, at the Wayback Machine., in Haaretz.com ^ Rockmore, Tom (April 21, 2011). Before and After 9/11: A Philosophical Examination of Globalization, Terror. ISBN 978-1-4411-1892-9. Retrieved September 11, 2011.  ^ Bernard Lewis, 2004. In Bernard Lewis's 2004 book The Crisis of Islam: Holy War and Unholy Terror, he argues that animosity toward the West is best understood with the decline of the once powerful Ottoman empire, compounded by the import of western ideas – Arab socialism, Arab liberalism and Arab secularism. During the past three centuries, according to this interpretation, the Islamic world has lost its dominance and its position of leadership in the world and has fallen behind both the modern West and the rapidly modernizing Orient. The resulting widening gap poses increasingly severe problems, both practical and emotional, for which the rulers, thinkers, and rebels of Islam have not yet found effective answers. ^ In an essay titled "The spirit of terrorism", Jean Baudrillard described 9/11 as the first global event that "questions the very process of globalization". Baudrillard. "The spirit of terrorism". Retrieved June 26, 2011.  ^ In an essay entitled "Somebody Else's Civil War", Michael Scott Doran argues the attacks are best understood as part of a religious conflict within the Muslim world and that Bin Laden's followers "consider themselves an island of true believers surrounded by a sea of iniquity". Hoping that U.S. retaliation would unite the faithful against the West, bin Laden sought to spark revolutions in Arab nations and elsewhere. Doran argues the Osama bin Laden
Osama bin Laden
videos attempt to provoke a visceral reaction in the Middle East and ensure that Muslim citizens would react as violently as possible to an increase in U.S. involvement in their region. ("Somebody Else's Civil War". Foreign Affairs. Retrieved December 5, 2009.  Reprinted in Hoge, James F.; Rose, Gideon (2005). Understanding the War on Terror. New York: Norton. pp. 72–75. ISBN 978-0-87609-347-4. ) ^ In The Osama bin Laden
Osama bin Laden
I Know, Peter Bergen
Peter Bergen
argues the attacks were part of a plan to cause the United States
United States
to increase its military and cultural presence in the Middle East, thereby forcing Muslims to confront the idea of a non-Muslim government and to eventually establish conservative Islamic governments in the region.(Bergen (2006), p. 229.) ^ "Suspect 'reveals 9/11 planning'". BBC
BBC
News. September 22, 2003. Retrieved September 3, 2011.  ^ a b c d 9/11 Commission
9/11 Commission
Report, Chapter 5, pp ?? ^ Lichtblau, Eric (March 20, 2003). "Bin Laden Chose 9/11 Targets, Al Qaeda Leader Says". The New York Times. Retrieved September 3, 2011.  ^ Wright (2006), p. 308. ^ Bergen (2006), p. 283. ^ Wright (2006), pp. 309–15. ^ McDermott (2005), pp. 191–92. ^ Bernstein, Richard (September 10, 2002). "On Path to the U.S. Skies, Plot Leader Met bin Laden". The New York Times. Retrieved September 3, 2011.  ^ Wright (2006), pp. 304–07. ^ Wright (2006), p. 302. ^ Jessee 2006, p. 371. ^ a b c d e f "9/11 commission staff statement No. 16" (PDF). 9/11 Commission. June 16, 2004. Retrieved September 11, 2012.  ^ "Staff Monograph on 9/11 and Terrorist Travel" (PDF). 9/11 Commission. 2004. Retrieved September 3, 2011.  ^ Irujo, Jose María (March 21, 2004). "Atta recibió en Tarragona joyas para que los miembros del 'comando' del 11-S se hiciesen pasar por ricos saudíes". El País (in Spanish). Retrieved April 10, 2012.  ^ "Entry of the 9/11 Hijackers into the United States
United States
Staff Statement No. 1" (PDF). National Commission on Terrorist Attacks Upon The United States: 2.  ^ Wright 2006, pp. 310–312. ^ Clarke 2004, pp. 235–236. ^ Wright 2006, p. 344. ^ Clarke 2004, pp. 236–237. ^ Clarke 2004, pp. 242–243. ^ Wright 2006, p. 340. ^ Wright 2006, pp. 340–343. ^ Wright 2006, pp. 352–353. ^ Wright 2006, p. 350. ^ Yitzhak 2016, p. 218. ^ "THE OSAMA BIN LADEN FILE: National Security Archive Electronic Briefing Book
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No. 343". The National Security Archive. The National Security Archive. Retrieved March 14, 2016.  ^ Wright 2006, pp. 350–351. ^ Wright 2006, pp. 342–343. ^ Javorsek II et al. 2015, p. 742. ^ Clarke 2004, p. 238. ^ a b c 9/11 Commission
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Report, pp. 4–14. ^ a b "The Attack Looms". 9/11 Commission
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Report. National Commission on Terrorist Attacks Upon the United States. 2004. Retrieved September 1, 2011.  ^ See, for example, news coverage by CNN: "Breaking News Videos from CNN.com". CNN.  ^ Jones, Jonathan. "The 9/11 attack seen from space – an image of impotence". The Guardian. Archived from the original on March 12, 2014.  ^ "Flight Path Study – American Airlines
American Airlines
Flight 11" (PDF). National Transportation Safety Board. February 19, 2002.  ^ "Flight Path Study – United Airlines
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Flight 175" (PDF). National Transportation Safety Board. February 19, 2002.  ^ "Flight Path Study – American Airlines
American Airlines
Flight 77" (PDF). National Transportation Safety Board. February 19, 2002.  ^ Snyder, David (April 19, 2002). "Families Hear Flight 93's Final Moments". The Washington Post. Retrieved November 12, 2013.  ^ "Text of Flight 93 Recording". Fox News Channel. April 12, 2006. Retrieved November 11, 2013.  ^ "The Flight 93 Story". National Park Service. Retrieved September 21, 2011.  ^

McKinnon, Jim (September 16, 2001). "The phone line from Flight 93 was still open when a GTE operator heard Todd Beamer say: 'Are you guys ready? Let's roll'". Pittsburgh Post-Gazette. Retrieved April 10, 2011.  "Relatives wait for news as rescuers dig". CNN. September 13, 2001. Retrieved November 11, 2013.  Summers and Swan (2011), pp. 58, 463n, 476n. Wilgoren, Jodi and Edward Wong (September 13, 2001). "On Doomed Flight, Passengers Vowed To Perish Fighting". The New York Times. Retrieved September 1, 2011.  Serrano, Richard A. (April 11, 2006). "Moussaoui Jury Hears the Panic From 9/11". Los Angeles Times. Retrieved September 1, 2011.  Goo, Sara Kehaulani; Eggen, Dan (January 28, 2004). "Hijackers used Mace, knives to take over airplanes". San Francisco Chronicle. Retrieved November 12, 2013.  Ahlers, Mike M. (January 27, 2004). "9/11 panel: Hijackers may have had utility knives". CBS News. Retrieved September 1, 2011. 

^ "Encore Presentation: Barbara Olson Remembered". Larry King Live. CNN. January 6, 2002. Retrieved September 1, 2011.  ^ "National Commission Upon Terrorist Attacks in the United States". National Commission Upon Terrorist Attacks in the United States. January 27, 2004. Retrieved January 24, 2008.  ^ Summers and Swan (2011), p. 343. ^ a b c Miller, Bill (May 1, 2002). "Skyscraper Protection Might Not Be Feasible, Federal Engineers Say". Orlando Sentinel. Retrieved November 24, 2013.  ^ World Trade Center Building Performance Study, Ch. 5 WTC 7 – section 5.5.4 ^ Final Report on the Collapse of World Trade Center Building 7, p. xxxvii. ^ "Flight 77, Video 2". Judicial Watch. Retrieved April 4, 2012.  ^ "Chapter 1: "We have some planes"" (PDF). 9/11 Commission
9/11 Commission
Report. July 22, 2004.  ^ "Profiles of 9/11 – About 9/11". The Biography Channel. A&E Television Networks. Archived from the original on July 22, 2011. Retrieved September 2, 2011.  ^ Miller, Mark (August 26, 2002). "Three hours that shook America: A chronology of chaos". Broadcasting & Cable. Retrieved September 2, 2011.  ^ Adams, Marilyn; Levin, Alan and Morrison, Blake (August 13, 2002). "Part II: No one was sure if hijackers were on board". USA Today. Retrieved September 2, 2011. CS1 maint: Multiple names: authors list (link) ^ Fouda and Fielding (2004), pp. 158–9. ^ a b Summers and Swan (2011), p. 323. ^ " Al-Qaeda
Al-Qaeda
'plotted nuclear attacks'". BBC
BBC
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Suppression Act 2002". New Zealand Government. Archived from the original on December 19, 2011. Retrieved September 4, 2011.  ^ Beck, Roger (2004). "20". Modern World History. Holt McDougal. pp. 657–8. ISBN 978-0-618-69012-1.  ^ "President Obama's Dragnet". June 6, 2013.  ^ "Author of Patriot Act: FBI's FISA Order is Abuse of Patriot Act". June 6, 2013. Archived from the original on June 10, 2013.  ^ "9/11 Investigation (PENTTBOM)". Federal Bureau of Investigation. Archived from the original on October 10, 2010. Retrieved April 11, 2012.  ^ "Testimony of Dale L. Watson, Executive Assistant Director, Counterterrorism/Counterintelligence Division, FBI Before the Senate Select Committee on Intelligence". Federal Bureau of Investigation. February 6, 2002. Archived from the original on April 10, 2010. Retrieved September 4, 2011.  ^ "Unraveling 9–11 Was in the Bags". Newsday. February 6, 2009. Retrieved April 11, 2012.  ^ Clarke, Richard A. (2004). Against All Enemies: Inside America's War on Terrorism. New York: Simon & Schuster. pp. 13–14. ISBN 978-0-7432-6823-3.  ^ "FBI Announces List of 19 Hijackers". Federal Bureau of Investigation. Retrieved September 4, 2011.  ^ "The FBI Releases 19 Photographs of Individuals Believed to be the Hijackers of the Four Airliners that Crashed on September 11, 2001". Federal Bureau of Investigation. Retrieved September 4, 2011.  ^ Johnston, David (September 9, 2003). "TWO YEARS LATER: 9/11 TACTICS; Official Says Qaeda Recruited Saudi Hijackers to Strain Ties". The New York Times. Retrieved September 4, 2011.  ^ "Piece by piece, the jigsaw of terror revealed". The Independent. London. September 30, 2001. Archived from the original on October 15, 2009. Retrieved September 4, 2011.  ^ 9/11 Commission Report
9/11 Commission Report
pp. 266–272 ^ The Manhunt Goes Global Time magazine October 15, 2001 ^ Tagliabue, John; Bonner, Raymond (September 29, 2001). "A Nation challenged: German Intelligence; German Data Led U.S. to Search For More Suicide Hijacker Teams". The New York Times. Retrieved September 4, 2011.  ^ 9/11 Commission Report
9/11 Commission Report
pp. 276–277 ^ "The proof they did not reveal". Sunday Times. October 7, 2001. Archived from the original on November 16, 2001.  ^ "Deep Background". American Conservative. April 1, 2005. Retrieved April 11, 2012.  ^ Shrader, Katherine (May 17, 2007). "Senators Want CIA to Release 9/11 Report". San Francisco Chronicle. Associated Press. Archived from the original on October 17, 2007. Retrieved September 4, 2011.  ^ Press Release of Intelligence Committee, Senate and House Intelligence Committees Announce Joint Inquiry into the September 11 Terrorist Attacks, February 14, 2002. ^ "Congressional Reports: Joint Inquiry into Intelligence Community Activities before and after the Terrorist Attacks of September 11, 2001". Archived from the original on August 7, 2010. Retrieved August 10, 2010.  ^ a b c Athan G. Theoharis, editor, The Central Intelligence Agency: Security Under Scrutiny, Greenwood Publishing Group, p. 222-224, 2006, ISBN 0-313-33282-7 ^ Ali Watkins, Senate intelligence panel could seek to declassify documents; it just doesn't Archived September 3, 2014, at the Wayback Machine., McClatchy Washington Bureau, August 12, 2013. ^ Improving Intelligence, PBS
PBS
interview with Sen. Bob Graham, December 11, 2002. ^ Chris Mondics, Struggling to detail alleged Saudi role in 9/11 attacks, Philadelphia Inquirer, March 31, 2014. ^ Paul Sperry, Inside the Saudi 9/11 coverup, New York Post, December 15, 2013. ^ April 10, 2014 Letter to Barack Obama, signed by Representatives Walter B. Jones Jr.
Walter B. Jones Jr.
and Stephen Lynch. ^ Jake Tapper, Why hasn't Obama kept promise to declassify 28 pages of a report about 9/11?", CNN, September 8, 2014. ^ Lawrence Wright, The Twenty-Eight Pages, The New Yorker, September 9, 2014. ^ Euan McKirdy, [1], CNN, June 14, 2016. ^ "Why Obama doesn't want 9/11 families suing Saudi Arabia". USA Today. September 23, 2016. ^ " Saudi Arabia
Saudi Arabia
threatens to pull $750B from U.S. economy if Congress allows them to be sued for 9/11 terror attacks". Daily News (New York). April 16, 2016. ^ "Mayor de Blasio joins Democrats in calling on President Obama to go after Saudi Arabia
Saudi Arabia
on 9/11 ties". Daily News (New York). April 19, 2016. ^ "National Commission on Terrorist Attacks Upon the United States". govinfo.library.unt.edu. Retrieved September 4, 2011.  ^ "Foresight-and Hindsight". National Commission on Terrorist Attacks Upon the United States. Retrieved September 4, 2011.  ^ Bennett, Brian (August 30, 2011). " Post-9/11 assessment sees major security gaps". Los Angeles Times. Retrieved September 4, 2011.  ^ "NIST's World Trade Center Investigation". National Institute of Standards and Technology. U.S. Department of Commerce. December 14, 2007. Retrieved September 4, 2011.  ^ a b "NIST WTC 7 Investigation Finds Building Fires Caused Collapse". The National Institute of Standards and Technology. Retrieved September 4, 2011.  ^ National Construction Safety Team (September 2005). "Executive Summary". Final Report on the Collapse of the World Trade Center Towers (PDF). National Institute of Standards and Technology. United States Department of Commerce. Retrieved April 10, 2011.  ^ Irfanoglu, A.; Hoffmann, C. M. (2008). "Engineering Perspective of the Collapse of WTC-I". Journal of Performance of Constructed Facilities. American Society of Civil Engineers. 22: 62. doi:10.1061/(ASCE)0887-3828(2008)22:1(62). As the aircraft debris went through several stories in the tower, much of the thermal insulation on the core columns would have been scoured off. Under such conditions, the ensuing fire would be sufficient to cause instability and initiate collapse. From an engineering perspective, impact damage to the core structure had a negligible effect on the critical thermal load required to initiate collapse in the core structure.  ^ Tally, Steve (June 12, 2007). "Purdue creates scientifically based animation of 9/11 attack". Purdue News Service. Retrieved September 4, 2011. The aircraft moved through the building as if it were a hot and fast lava flow", Sozen says. "Consequently, much of the fireproofing insulation was ripped off the structure. Even if all of the columns and girders had survived the impact – an unlikely event – the structure would fail as the result of a buckling of the columns. The heat from an ordinary office fire would suffice to soften and weaken the unprotected steel. Evaluation of the effects of the fire on the core column structure, with the insulation removed by the impact, showed that collapse would follow whatever the number of columns cut at the time of the impact.  ^ Sigmund, Pete (September 25, 2002). "Building a Terror-Proof Skyscraper: Experts Debate Feasibility, Options". Retrieved April 11, 2012.  ^ "Translating WTC Recommendations into Model Building Codes". National Institute of Standards and Technology. October 25, 2007. Archived from the original on March 10, 2011. Retrieved September 4, 2011.  ^ Taylor, Tess (September 26, 2001). "Rebuilding in New York". Architecture Week (68). Retrieved September 4, 2011.  ^ Oglesby, Christy (September 11, 2002). "Phoenix rises: Pentagon honors 'hard-hat patriots'". CNN. Archived from the original on December 18, 2004. Retrieved May 29, 2014.  ^ Bagli, Charles V. (September 22, 2006). "An Agreement Is Formalized on Rebuilding at Ground Zero". The New York Times. Retrieved September 4, 2011.  ^ Badia, Erik; Sit, Ryan (May 10, 2013). " One World Trade Center
One World Trade Center
gets spire, bringing it to its full 1,776-foot height". New York Daily News website. Retrieved January 12, 2015.  ^ Iyengar, Rishi (November 3, 2014). " One World Trade Center
One World Trade Center
Opens Its Doors". Time. Retrieved January 12, 2015.  ^ "Lower Manhattan: Current Construction". Lower Manhattan Construction Command Center. Archived from the original on September 14, 2011. Retrieved September 8, 2011.  ^ Sigmund, Pete. "Crews Assist Rescuers in Massive WTC Search". Construction Equipment Guide. Retrieved September 4, 2011.  ^ "Tribute in light to New York victims". BBC
BBC
News. March 6, 2002. Retrieved April 1, 2012.  ^ "About the World Trade Center Site Memorial Competition". World Trade Center Site Memorial Competition. Retrieved September 4, 2011.  ^ "WTC Memorial Construction Begins". CBS News. Associated Press. March 6, 2006. Retrieved September 4, 2011.  ^ "A Place of Remembrance". National Geographic. 2011. Archived from the original on November 5, 2014. Retrieved November 5, 2014.  ^ "National September 11 Memorial Museum opens". Fox NY. May 21, 2014. Archived from the original on May 21, 2014. Retrieved May 21, 2014.  ^ Miroff, Nick (September 11, 2008). "Creating a Place Like No Other". The Washington Post. Retrieved September 4, 2011.  ^ Miroff, Nick (September 12, 2008). "A Long-Awaited Opening, Bringing Closure to Many". The Washington Post. Retrieved September 4, 2011.  ^ Dwyer, Timothy (May 26, 2007). " Pentagon Memorial
Pentagon Memorial
Progress Is Step Forward for Families". The Washington Post. Retrieved September 4, 2011.  ^ "DefenseLINK News Photos – Pentagon's America's Heroes Memorial". Department of Defense. Archived from the original on November 30, 2009. Retrieved September 4, 2011.  ^ " Flight 93 National Memorial
Flight 93 National Memorial
– Sources and Detailed Information". nps.gov. National Park Service. n.d. Retrieved January 31, 2017. 13. When will the Memorial be finished?  ^ a b " Flight 93 National Memorial
Flight 93 National Memorial
– Frequently Asked Questions (FAQs)" (PDF). nps.gov. National Park Service. May 2013. pp. 22–23. Retrieved January 31, 2017.  ^ "A Long Road to a Place of Peace for Flight 93 Families". The New York Times. September 9, 2015. Retrieved September 9, 2015.  ^ "Flight 93 Memorial Project". Flight 93 Memorial Project / National Park Service. Archived from the original on April 11, 2008. Retrieved September 4, 2011.  ^ Nephin, Dan (August 24, 2008). "Steel cross goes up near flight's 9/11 Pa. crash site". Associated Press. Retrieved September 5, 2011.  ^ Gaskell, Stephanie (August 25, 2008). "Pa. site of 9/11 crash gets WTC beam". Daily News. New York. Retrieved September 4, 2011.  ^ Fessenden, Ford (November 18, 2002). "9/11; After the World Gave: Where $2 Billion in Kindness Ended Up". The New York Times. Retrieved September 4, 2011.  ^ Newman, Andy (September 11, 2010). "At a Memorial Ceremony, Loss and Tension". The New York Times. 

Bibliography

"Chapter 1.1: 'We Have Some Planes': Inside the Four Flights", 9/11 Commission Report (PDF), National Commission on Terrorist Attacks Upon the United States, 2004, retrieved March 18, 2016  Alavosius, Mark P.; Rodriquez, Nischal J. (2005), "Unity of Purpose/Unity of effort: Private-Sector Preparedness in Times of Terror", Disaster Prevention & Management, 14 (5): 666, doi:10.1108/09653560510634098  " American Airlines Flight 77
American Airlines Flight 77
FDR Report" (PDF). National Transportation Safety Board. January 31, 2002. Retrieved September 3, 2011.  Averill, Jason D. (2005), Final Reports of the Federal Building and Fire Investigation of the World Trade Center Disaster (PDF), National Institute of Standards and Technology (NIST), archived from the original (PDF) on May 9, 2009, retrieved September 2, 2011  Bergen, Peter L. (2001), Holy War, Inc.: Inside the Secret World of Osama Bin Laden, Simon and Schuster, ISBN 978-0-7432-3467-2, retrieved March 18, 2016  Bergen, Peter (2006), The Osama Bin Laden I Know: An Oral History of Al Qaeda's Leader, Simon and Schuster, ISBN 978-0-7432-9592-5, retrieved March 18, 2016  Berner, Brad (2007), The World According to Al Qaeda, Peacock Books, ISBN 978-81-248-0114-7, retrieved March 18, 2016  Clarke, Richard (2004), Against All Enemies: Inside America's War on Terror, New York: Free Press, ISBN 0-7432-6024-4  Dwyer, Jim; Flynn, Kevin (2005), 102 Minutes, Times Books, ISBN 978-0-8050-7682-0, retrieved March 18, 2016  "Final Report on the Collapse of World Trade Center Building 7" (PDF). National Institute of Standards and Technology. November 2008. Retrieved April 11, 2012.  "Flight Path Study – American Airlines
American Airlines
Flight 77" (PDF). National Transportation Safety Board. February 19, 2002. Retrieved September 3, 2011.  Fouda, Yosri; Fielding, Nick (2004), Masterminds of Terror: The Truth Behind the Most Devastating Terrorist Attack the World Has Ever Seen, Arcade Publishing, ISBN 978-1-55970-717-6, retrieved March 18, 2016  Goldberg, Alfred (2007), Pentagon 9/11, Washington, D.C.: Government Printing Office, ISBN 978-0-16-078328-9, retrieved March 18, 2016  Gunaratna, Ronan (2002), Inside Al Qaeda: global network of terror, Columbia University Press, ISBN 978-0-231-12692-2  Holmes, Stephen (2006), "Al Qaeda, September 11, 2001", in Diego Gambetta, Making sense of suicide missions, Oxford University Press, ISBN 978-0-19-929797-9, retrieved March 18, 2016  Ibrahim, Raymond; Osama Bin Laden (2007), The Al Qaeda reader, Random House Digital, Inc., ISBN 978-0-385-51655-6, retrieved March 18, 2016  Javorsek II, Daniel; Rose, John; Marshall, Christopher; Leitner, Peter (August 5, 2015), "A Formal Risk-Effectiveness Analysis Proposal for the Compartmentalized Intelligence Security Structure", International Journal of Intelligence and CounterIntelligence, 28 (4): 734–761, doi:10.1080/08850607.2015.1051830  Jessee, Devin (2006), "Tactical Means, Strategic Ends: Al Qaeda's Use of Denial and Deception" (PDF), International Journal of Intelligence and CounterIntelligence, 18 (3): 367–388, doi:10.1080/09546550600751941  Kelley, Christopher (2006), Executing the Constitution: putting the president back into the Constitution, SUNY Press, ISBN 978-0-7914-6727-5, retrieved March 18, 2016  Keppel, Gilles; Milelli, Jean-Pierre and Ghazaleh, Pascale (2008), Al Qaeda in its own words, Harvard University Press, ISBN 978-0-674-02804-3, retrieved March 18, 2016 CS1 maint: Multiple names: authors list (link) Lawrence, Bruce; Bruce Lawrence (2005), Messages to the world: the statements of Osama Bin Laden, Verso, ISBN 978-1-84467-045-1, retrieved May 29, 2014  Martin, Gus (2011), The SAGE Encyclopedia of Terrorism, Second Edition, SAGE, ISBN 978-1-4129-8017-3, retrieved March 18, 2016  McDermott, Terry (2005), Perfect Soldiers: The 9/11 Hijackers, HarperCollins, pp. 191–192, ISBN 978-0-06-058470-2  "McKinsey Report". FDNY / McKinsey & Company. August 9, 2002. Archived from the original on June 3, 2010. Retrieved September 25, 2011.  Mearsheimer, John J. (2007), The Israel
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Lobby and U.S. Foreign Policy, Macmillan, ISBN 978-0-374-17772-0  Murdico, Suzanne (2003), Osama Bin Laden, Rosen Publishing Group, ISBN 978-0-8239-4467-5  " The Pentagon
The Pentagon
Building Performance Report" (PDF). American Society of Civil Engineers (ASCE). January 2003. Archived from the original (PDF) on July 21, 2011. Retrieved September 3, 2011.  Summers, Anthony; Swan, Robbyn (2011), The Eleventh Day: The Full Story of 9/11 and Osama Bin Laden, New York: Ballantine Books, ISBN 1-4000-6659-X, retrieved March 18, 2016  Sunder, Shyam S. (2005), Final Report on the Collapse of the World Trade Center Towers, National Institute of Standards and Technology (NIST), retrieved September 2, 2011  "World Trade Center Building Performance Study – Bankers Trust Building" (PDF). FEMA. May 2002. Retrieved July 12, 2007.  "World Trade Center Building Performance Study – Peripheral Buildings" (PDF). FEMA. May 2002. Retrieved September 3, 2011.  "World Trade Center Building Performance Study" (PDF). Ch. 5 WTC 7 – section 5.5.4. Federal Emergency Management Agency. 2002. Retrieved September 2, 2011.  Wright, Lawrence (2006), The Looming Tower: Al-Qaeda
Al-Qaeda
and the Road to 9/11, Knopf, ISBN 978-0-375-41486-2  Yitzhak, Ronen (Summer 2016), "The War Against Terrorism
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and For Stability of the Hashemite Regime: Jordanian Intelligence Challenges in the 21st Century", International Journal of Intelligence and CounterIntelligence, 29 (2): 213–235, doi:10.1080/08850607.2016.1121038 

Further reading

The 9/11 Commission
9/11 Commission
Report: Final Report of the National Commission on Terrorist Attacks Upon the United States. National Commission on Terrorist Attacks. Cosimo, Inc. July 30, 2010. ISBN 978-1-61640-219-8.  Atkins, Stephen E (2011). The 9/11 Encyclopedia. ABC-CLIO. ISBN 978-1-59884-921-9.  Bolton, M. Kent (2006). U.S. National Security and Foreign Policymaking After 9/11: Present at the Re-creation. Rowman & Littlefield. ISBN 978-0-7425-5900-4.  Caraley, Demetrios (2002). September 11, terrorist attacks, and U.S. foreign policy. Academy of Political Science. ISBN 978-1-884853-01-2.  Chernick, Howard (2005). Resilient city: the economic impact of 9/11. Russell Sage Foundation. ISBN 978-0-87154-170-3.  Damico, Amy M; Quay, Sara E. (2010). September 11 in Popular Culture: A Guide. Greenwood. ISBN 978-0-313-35505-9.  Hampton, Wilborn (2003). September 11, 2001: attack on New York City. Candlewick Press. ISBN 978-0-7636-1949-7.  Langley, Andrew (2006). September 11: Attack on America. Compass Point Books. ISBN 978-0-7565-1620-8.  Neria, Yuval; Gross, Raz; Marshall, Randall D.; Susser, Ezra S. (2006). 9/11: mental health in the wake of terrorist attacks. Cambridge University Press. ISBN 978-0-521-83191-8. CS1 maint: Multiple names: authors list (link) Ryan, Allan A. The 9/11 Terror Cases: Constitutional Challenges in the War against Al Qaeda (University Press of Kansas, 2015). xxii, 218 pp. Strasser, Steven; Whitney, Craig R; United States. Congress. Senate. Select Committee on Intelligence, National Commission on Terrorist Attacks upon the United States
United States
(2004). The 9/11 investigations: staff reports of the 9/11 Commission: excerpts from the House–Senate joint inquiry report on 9/11: testimony from fourteen key witnesses, including Richard Clarke, George Tenet, and Condoleezza Rice. PublicAffairs. ISBN 978-1-58648-279-4. 

External links

Find more about September 11 attacksat's sister projects

Definitions from Wiktionary Media from Wikimedia Commons News from Wikinews Quotations from Wikiquote Texts from Wikisource Learning resources from Wikiversity Data from Wikidata

National Commission on Terrorist Attacks Upon the United States official commission website National September 11th Memorial and Museum – List of victims September 11, 2001, Documentary Project from the U.S. Library of Congress, Memory.loc.gov September 11, 2001, Web Archive from the U.S. Library of Congress, Minerva The September 11th Sourcebooks from The National Security Archive September 11 Digital Archive: Saving the Histories of September 11, 2001, from the Center for History and New Media and the American Social History Project/Center for Media and Learning DoD: Khalid Sheikh Mohammed
Khalid Sheikh Mohammed
Verbatim Transcript of Combatant Status Review Tribunal Hearing for ISN 10024, From WikiSource

Multimedia

Understanding 9/11 – A Television News Archive at Internet Archive CNN.com – Video archive, including the first and second planes Remembering 9/11 – National Geographic Society Time.com – 'Shattered: a remarkable collection of photographs', James Nachtwey September 11, 2001, Screenshot Archive – Database of 230 screenshots from news sites around the world Archive of newspaper front page images for 2001-09-11 at the Newseum

v t e

September 11 attacks

Timeline

Planning September 11, 2001 World Trade Center collapse Remainder of September October Post-October

Victims

Casualties

emergency workers

Hijacked airliners

American Airlines
American Airlines
Flight 11 United Airlines
United Airlines
Flight 175 American Airlines
American Airlines
Flight 77 United Airlines
United Airlines
Flight 93 Suspected hijackings

Korean Air Flight 85 Delta Air Lines Flight 1989

Crash sites

World Trade Center

World Trade Center site

The Pentagon Stonycreek / Shanksville, Pennsylvania

Aftermath

Immediate repercussions

Artwork destroyed Closings and cancellations Detentions

Communication Post-9/11

Economy Local health Airport security

Reactions

Conspiracy theories

Rudy Giuliani Unsuccessful terrorist plots

Response

U.S. government response U.S. military response

War on Terror Afghanistan North-West Pakistan

Rescue and recovery effort Financial assistance Operation SUPPORT Operation Yellow Ribbon Memorials and services

9/11 Memorial and Museum

World Trade Center Health Program

Perpetrators

Responsibility Alleged Saudi role Motives Hijackers

20th hijacker

Trials

Inquiries

U.S. Congressional Inquiry

the 28 pages

September 11 intelligence before the attacks

August 2001 CIA warning

9/11 Commission

Commission Report Criticism

NIST Investigation PENTTBOM ThinThread

Cultural effects

Cultural references

Songs Comics Books

Cartoonists Remember 9/11 Entertainment Humor Lost artworks

Miscellaneous

War games Patriot Day The Falling Man Raising the Flag at Ground Zero Tourist Guy hoax Iraq
Iraq
War Twin Towers 2 Henryk Siwiak homicide Disappearance of Sneha Anne Philip Tania Head

Book Category Portal WikiProject

Links to related articles

v t e

New York City's World Trade Center

First WTC (1973–2001)

Construction Towers

One Two Three Four Five Six Seven

Windows on the World Mall The Bathtub Tenants

One Two Four Five Six Seven

Art

Bent Propeller The Sphere The World Trade Center Tapestry World Trade Center Plaza Sculpture Ideogram Sky Gate, New York

Major events

February 13, 1975 fire February 26, 1993 bombing January 14, 1998 robbery September 11, 2001 attacks

Collapse Timeline Victims Aftermath Deutsche Bank Building St. Nicholas Greek Orthodox Church

Second WTC (2001–present)

Site, towers, and structures

One

Construction

Two Three Four Five Seven Performing Arts Center Vehicular Security Center Liberty Park

St. Nicholas Greek Orthodox Church

Westfield Mall Artwork (ONE: Union of the Senses)

Rapid transit

PATH stations

Transportation Hub

New York City Subway
New York City Subway
stations

Chambers Street – WTC / Park Place (2, ​3​, A, ​C, and ​E trains) Cortlandt Street (N, ​R, and ​W trains) Cortlandt Street (1 and ​2 trains) Fulton Street (2, ​3​, 4, ​5​, A, ​C​, J, and ​Z trains)

Fulton Center

Corbin Building Dey Street Passageway

9/11 memorials

9/11 Tribute Museum National September 11 Memorial & Museum

Competition Memory Foundations

Tribute in Light America's Response Monument Empty Sky Relics from original WTC

The Sphere Cross Survivors' Staircase

People

Minoru Yamasaki Emery Roth & Sons Larry Silverstein Austin J. Tobin David Childs Michael Arad THINK Team Daniel Libeskind Leslie E. Robertson

Other

Park51 Project Rebirth Take Back The Memorial West Street pedestrian bridges In popular culture

Film Music 9/11-related media featuring One WTC

10048 ZIP code Former: IFC Former: Twin Towers 2

Brookfield Place

Brookfield Place 200 Liberty Street 225 Liberty Street 200 Vesey Street 250 Vesey Street Winter Garden Atrium New York Mercantile Exchange

v t e

War on Terror

War in Afghanistan Iraq
Iraq
War War in North-West Pakistan Symbolism of terrorism

Participants

Operational

ISAF Operation Enduring Freedom
Operation Enduring Freedom
participants Afghanistan Northern Alliance Iraq
Iraq
(Iraqi Armed Forces) NATO Pakistan United Kingdom United States European Union Philippines Ethiopia

Targets

al-Qaeda Osama bin Laden al-Qaeda in the Arabian Peninsula Abu Sayyaf Anwar al-Awlaki Al-Shabaab Boko Haram Harkat-ul- Jihad
Jihad
al-Islami Hizbul Mujahideen Islamic Courts Union Islamic State of Iraq
Iraq
and the Levant Jaish-e-Mohammed Jemaah Islamiyah Lashkar-e-Taiba Taliban Islamic Movement of Uzbekistan

Conflicts

Operation Enduring Freedom

War in Afghanistan OEF – Philippines Georgia Train and Equip Program Georgia Sustainment and Stability OEF – Horn of Africa OEF – Trans Sahara Drone strikes in Pakistan

Other

Operation Active Endeavour Insurgency in the Maghreb (2002–present) Insurgency in the North Caucasus Moro conflict
Moro conflict
in the Philippines Iraq
Iraq
War Iraqi insurgency Operation Linda Nchi Terrorism
Terrorism
in Saudi Arabia War in North-West Pakistan War in Somalia
Somalia
(2006–09) 2007 Lebanon
Lebanon
conflict al-Qaeda insurgency in Yemen Korean conflict

See also

Abu Ghraib torture and prisoner abuse Axis of evil Black sites Bush Doctrine Clash of Civilizations Cold War Combatant Status Review Tribunal Criticism of the War on Terror Death of Osama bin Laden Enhanced interrogation techniques Torture Memos Extrajudicial prisoners Extraordinary rendition Guantanamo Bay detention camp Iranian Revolution Islamic terrorism Islamism Military Commissions Act of 2006 North Korea and weapons of mass destruction Terrorist Surveillance Program Operation Noble Eagle Operation Eagle Assist Pakistan's role Patriot Act President's Surveillance Program Protect America Act of 2007 September 11 attacks State Sponsors of Terrorism Targeted killing Targeted Killing in International Law Targeted Killings: Law and Morality in an Asymmetrical World Unitary executive theory Unlawful combatant Withdrawal of U.S. troops from Afghanistan CAGE

Terrorism
Terrorism
portal War portal

v t e

al-Qaeda

Leadership

Ayman al-Zawahiri Saif al-Adel Abdullah Ahmed Abdullah Hamza bin Laden Abdelmalek Droukdel Mokhtar Belmokhtar Qasim al-Raymi Abu Mohammad al-Julani Ahmad Umar Asim Umar Ezedin Abdel Aziz Khalil

Former leadership

Osama bin Laden
Osama bin Laden
(killed) Abu Yahya al-Libi (killed) Khalid Sheikh Mohammed
Khalid Sheikh Mohammed
(captured) Mamdouh Mahmud Salim
Mamdouh Mahmud Salim
(captured) Anwar al-Awlaki
Anwar al-Awlaki
(killed) Samir Khan (killed) Younis al-Mauritani (captured) Mohammed Atef
Mohammed Atef
(killed) Fazul Abdullah Mohammed (killed) Abu Faraj al-Libbi (captured) Atiyah Abd al-Rahman (killed) Abu Laith al-Libi
Abu Laith al-Libi
(killed) Fahd al-Quso (killed) Ilyas Kashmiri
Ilyas Kashmiri
(killed) Abu Hamza Rabia (killed) Haitham al-Yemeni (killed) Abdullah Said al Libi (killed) Abu Sulayman Al-Jazairi (killed) Saleh al-Somali (killed) Abu Ubaidah al-Masri (died) Saad bin Laden (killed) Fahid Mohammed Ally Msalam (killed) Sheikh Ahmed Salim Swedan (killed) Ahmed Mohammed Hamed Ali (killed) Mohammad Hasan Khalil al-Hakim (killed) Mushin Musa Matwalli Atwah (killed) Midhat Mursi (killed) Saeed al-Masri (killed) Hassan Ghul (killed) Abu Ubaidah al-Banshiri (died) Walid bin Attash
Walid bin Attash
(captured) Abd al-Rahim al-Nashiri
Abd al-Rahim al-Nashiri
(captured) Mustafa Setmariam Nasar (captured) Qaed Salim Sinan al-Harethi (killed) Khalid Habib (killed) Abdul Hadi al Iraqi (captured) Mustafa Mohamed Fadhil
Mustafa Mohamed Fadhil
(killed) Mohamed Abul-Khair (killed) Mahfouz Ould al-Walid (left) Sulaiman Abu Ghaith (captured) Abu Anas al-Libi (captured and died) Abu Musab al-Zarqawi
Abu Musab al-Zarqawi
(killed) Abu Ayyub al-Masri (killed) Abu Omar al-Baghdadi (killed) Abu Bakr al-Baghdadi
Abu Bakr al-Baghdadi
(expelled) Abu-Zaid al Kuwaiti
Abu-Zaid al Kuwaiti
(killed) Omar al-Faruq (killed) Said Ali al-Shihri
Said Ali al-Shihri
(killed) Ahmed Abdi Godane (killed) Adnan Gulshair el Shukrijumah (killed) Adam Yahiye Gadahn (killed) Harith bin Ghazi al-Nadhari
Harith bin Ghazi al-Nadhari
(killed) Ibrahim Sulayman Muhammad
Muhammad
Arbaysh (killed) Nasser bin Ali al-Ansi
Nasser bin Ali al-Ansi
(killed) Nasir al-Wuhayshi
Nasir al-Wuhayshi
(killed) Muhsin al-Fadhli
Muhsin al-Fadhli
(killed) Abu Khalil al-Madani (killed) Abu Khayr al-Masri (killed)

Timeline of attacks

1998 United States
United States
embassy bombings 2000 USS Cole bombing 2001 September 11 attacks 2002 Bali bombings 2007 Algiers bombings 2008 Islamabad Danish embassy bombing 2008 Islamabad Marriott Hotel bombing 2012 Benghazi attack 2013 In Amenas hostage crisis 2013 Westgate shopping mall attack 2015 Charlie Hebdo shooting 2015 Garissa University College attack 2015 Bamako hotel attack 2016 Ouagadougou attacks 2016 Grand-Bassam shootings 2016 Bamako attack

Wars

Soviet–Afghan War Afghan Civil War (1989–92) Afghan Civil War (1992–96) Bosnian War

Bosnian Al-Qaeda

First Chechen War Afghan Civil War (1996–2001) Second Chechen War War in Afghanistan
Afghanistan
(2001–2014) Iraq
Iraq
War Somali Civil War War in North-West Pakistan
Pakistan
(Drone strikes) Insurgency in the Maghreb (2002–present) War in Afghanistan
Afghanistan
(2015–present) Syrian Civil War Yemeni Civil War

al-Qaeda insurgency in Yemen Houthi insurgency in Yemen

Affiliates

al-Shabaab (Somalia) al-Qaeda in the Arabian Peninsula (Yemen) al-Qaeda in the Islamic Maghreb (North Africa) Egyptian Islamic Jihad
Jihad
(Egypt) al-Qaeda in the Indian Subcontinent (Indian Subcontinent) Tahrir al-Sham
Tahrir al-Sham
(Syria)

Charity organizations

Benevolence International Foundation al-Haramain Foundation

Media

Al Qaeda Handbook Al Neda As-Sahab Fatawā of Osama bin Laden Inspire Al-Khansaa Kuala Lumpur
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← 2000 Aviation accidents and incidents
Aviation accidents and incidents
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Flight 11 Sep 11  United Airlines
United Airlines
Flight 175 Sep 11  American Airlines
American Airlines
Flight 77 Sep 11  United Airlines
United Airlines
Flight 93 Sep 11 Delta Air Lines Flight 1989 Sep 11 Korean Air Flight 85 Sep 17  Grozny Mi-8 crash Oct 4  Siberia Airlines Flight 1812 Oct 8  Linate Airport disaster Nov 12   American Airlines
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