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United Airlines Flight 175 was a domestic
passenger flight An airline is a company that provides air transport services for traveling passengers and freight. Airlines use aircraft to supply these services and may form partnerships or alliances with other airlines for codeshare agreements, in whi ...
that was
hijacked Hijacking may refer to: Common usage Computing and technology * Bluejacking, the unsolicited transmission of data via Bluetooth * Brandjacking, the unauthorized use of a company's brand * Browser hijacking * Clickjacking (including ''like ...
by five
al-Qaeda Al-Qaeda (; , ) is an Islamic extremism, Islamic extremist organization composed of Salafist jihadists. Its members are mostly composed of Arab, Arabs, but also include other peoples. Al-Qaeda has mounted attacks on civilian and military ta ...
terrorists on September 11, 2001, as part of the September 11 attacks. The flight's scheduled plan was from Logan International Airport, in Boston, Massachusetts, to
Los Angeles International Airport Los Angeles International Airport , commonly referred to as LAX (with each letter pronounced individually), is the primary international airport serving Los Angeles, California and its surrounding metropolitan area. LAX is located in the W ...
, in Los Angeles, California. The Boeing 767-200 aircraft was deliberately crashed into the South Tower of the World Trade Center in New York City, killing all 65 aboard and causing the deaths of around 600 people at or above the building's impact zone, making it the second deadliest of the four crashes on that day in terms of both plane and ground casualties, surpassed only by American Airlines Flight 11. 28 minutes into the flight, the hijackers forcibly breached the cockpit, murdered Captain Victor Saracini and First Officer Michael Horrocks, and forced the remaining passengers and crew to the rear of the aircraft. Lead hijacker Marwan al-Shehhi, who had trained as a pilot in preparation for the attacks, took control of the plane. Unlike Flight11, whose transponder was turned off, Flight175's transponder was visible on New York Center's radar, which depicted the aircraft's deviation from its assigned flight path for four minutes before air traffic controllers took notice at 08:51 EDT. Thereafter, they made several unsuccessful attempts to contact the cockpit. Three people aboard made phone calls to family members and colleagues on the ground and relayed information regarding the hijackers as well as casualties suffered by passengers and crew. The aircraft crashed into Tower Two (the South Tower) at 09:03. The Flight175 hijacking was coordinated with that of Flight 11, which struck the upper floors of Tower One (the North Tower) 17 minutes earlier. The crash of Flight175 into the South Tower was the only impact televised live around the world. The crash and subsequent fire caused the South Tower to collapse 56 minutes later at 09:59, resulting in hundreds of additional casualties. During the recovery effort at the World Trade Center site, workers uncovered and identified remains from some Flight175 victims, but many victims have not been identified.


Background


Attacks

The flight was hijacked as part of the September 11 attacks. The team was assembled by al-Qaeda leader
Osama bin Laden Osama bin Mohammed bin Awad bin Laden (10 March 1957 – 2 May 2011) was a Saudi-born extremist militant who founded al-Qaeda and served as its leader from 1988 until Killing of Osama bin Laden, his death in 2011. Ideologically a Pan-Islamism ...
, who also provided the financial and logistical support, and was led by Khalid Sheikh Mohammed who devised the plot. Bin Laden and Mohammed, along with the hijackers, were motivated by anti-US sentiment. The attacks were given the go ahead by bin Laden in late 1998 or early 1999. The World Trade Center was chosen as one of the targets due to it being a prominent American symbol that represented economic prowess.


Hijackers

The team of hijackers on United Airlines Flight175 was led by Marwan al-Shehhi, originally from the United Arab Emirates with a stint in Hamburg, Germany as a student. By January 2001, the pilot hijackers had completed their training; Shehhi obtained a commercial pilot licence while training in
South Florida South Florida is the southernmost region of the U.S. state of Florida. It is one of Florida's three most commonly referred to directional regions; the other two are Central Florida and North Florida. South Florida is the southernmost part of th ...
, along with American Airlines Flight 11 hijacker Mohamed Atta and Flight93 hijacker Ziad Jarrah. The hijackers on Flight175 included Fayez Banihammad, also from the UAE, and three Saudis: brothers Hamza al-Ghamdi and Ahmed al-Ghamdi, as well as Mohand al-Shehri. The hijackers were trained at an al-Qaeda camp called ''Mes Aynak'' in Kabul, Afghanistan, where they learned about weapons and explosives, followed by training in Karachi, Pakistan, where they learned about "Western culture and travel". Afterwards, they went to Kuala Lumpur, Malaysia for exercises in airport security and surveillance. Part of the training in Malaysia included boarding flights operated by US carriers so they could observe pre-boarding security screenings, flight crew movements around the cabin, and the timing of cabin services. A month before the attacks, Marwan al-Shehhi purchased two pocket knives from a Sports Authority store in
Boynton Beach, Florida Boynton Beach is a city in Palm Beach County, Florida, United States. It is situated about 57 miles north of Miami. The population was 68,217 at the 2010 census. In 2019, the city had an estimated population of 78,679 according to the University o ...
, while Banihammad bought a two-piece "snap" utility knife set at a Wal-Mart, and Hamza al-Ghamdi bought a
Leatherman Leatherman is an American brand of multitools and knives made by Leatherman Tool Group of Portland, Oregon. The company was founded in July 1983 by Timothy S. Leatherman and Steve Berliner in order to market his idea of a capable, eas ...
Wave multi-tool. The hijackers arrived in Boston from Florida between September 7 and 9.


Flight

The flight was operated by a Boeing 767-200, registration number N612UA, built and delivered to United Airlines in February 1983, with capacity of 168 passengers (10 in first class, 32 in business class, and 126 in economy class). On the day of the attacks, the flight carried only 56 passengers and 9crew, which represented a 33 percent load factorwell below the average load factor of 49 percent in the three months preceding September11. The youngest person on Flight175 was Christine Hanson, aged two and a half, and the oldest was 82-year-old Dorothy DeAraujo of Long Beach, California. Among the other passengers were hockey scout
Garnett Bailey Garnet Edward "Ace" Bailey (June 13, 1948 – September 11, 2001) was a Canadian professional ice hockey player and scout who was a member of Stanley Cup– and Memorial Cup– winning teams. He died at the age of 53 while aboard United Airlin ...
, and former athlete Mark Bavis. The nine crew members included Captain Victor Saracini (51), First Officer Michael Horrocks (38), purser Kathryn Laborie, and flight attendants Robert Fangman, Amy Jarret, Amy King, Alfred Marchand, Michael Tarrou, and Alicia Titus.


Boarding

Hamza al-Ghamdi and Ahmed al-Ghamdi checked out of their hotel and called a taxi to take them to Logan International Airport in Boston, Massachusetts. They arrived at the United Airlines counter in Terminal C at 06:20 Eastern Time and Ahmed al-Ghamdi checked two bags. Both hijackers indicated they wanted to purchase tickets, even though they already had paper tickets, which were purchased approximately 2 weeks before the attacks. They had trouble answering the standard security questions, so the counter agent repeated the questions very slowly until satisfied with their responses. Hijacker pilot Marwan al-Shehhi checked a single bag at 06:45, and the other remaining hijackers, Fayez Banihammad and Mohand al-Shehri, checked in at 06:53; Banihammad checked two bags. None of the Flight 175 hijackers were selected for extra scrutiny by the Computer Assisted Passenger Prescreening System (CAPPS). Shehhi and the other hijackers boarded Flight175 between 07:23 and 07:28. Banihammad boarded first and sat in first class seat 2A, while Mohand al-Shehri was in seat 2B. At 07:27, Shehhi and Ahmed al-Ghamdi boarded and sat in business class seats 6C and 9D, respectively. One minute later, Hamza al-Ghamdi boarded and sat in 9C. The flight was scheduled to depart at 08:00 for Los Angeles. Fifty-one passengers and the five hijackers boarded the 767 through Terminal C's Gate 19. The plane pushed back at 07:58 and took off at 08:14 from Runway 9, about the same time Flight11 was hijacked. By 08:33, the aircraft reached cruising altitude of , which is the point when cabin service would normally begin. At 08:37, air traffic controllers asked the pilots of Flight175 whether they could see American Airlines Flight 11. The crew first responded saying they could not locate the hijacked plane but would continue looking. They then responded that Flight11 was at , and controllers instructed Flight175 to turn and avoid the aircraft. The pilots declared that they had heard a suspicious transmission from Flight11 upon takeoff. "Sounds like someone keyed the mic and said 'Everyone, stay in your seats'," the flight crew reported. This was the last transmission from Flight175.


Hijacking

Flight 175 was hijacked between 08:42 and 08:46, while Flight11 was just minutes away from hitting the North Tower. It is believed that hijackers Banihammad and al-Shehri forcibly entered the cockpit and attacked the pilots while the al-Ghamdis commanded passengers and crew to the aft of the cabin and al-Shehhi took over the controls. Knives were used to stab the flight crew and kill both pilots. One passenger also reported, during a phone call, the use of mace and bomb threats. The first operational evidence that something was abnormal on Flight175 came at 08:47, when the plane's transponder signal changed twice within the span of one minute, and the aircraft began deviating from its assigned course. However, the air traffic controller in charge of the flight did not notice until minutes later at 08:51. Unlike Flight11, which had turned its transponder off, Flight175's flight data could still be properly monitored. Also, at 08:51, Flight175 changed altitude. Over the next three minutes, the controller made five unsuccessful attempts to contact Flight175 and worked to move other aircraft in the vicinity away from Flight175. At 08:55 a supervisor at the New York Air Traffic Control Center notified the center's operations manager of the Flight175 hijacking. Dave Bottigliathe controller who was handling both Flight11 and Flight175remarked, "We might have a hijack over here, two of them."


Near-misses

Around this time, the flight had a near midair collision with Delta Air Lines Flight2315 flying from Hartford to
Tampa Tampa () is a city on the Gulf Coast of the U.S. state of Florida. The city's borders include the north shore of Tampa Bay and the east shore of Old Tampa Bay. Tampa is the largest city in the Tampa Bay area and the seat of Hillsborough County ...
, reportedly missing the plane by only . Bottiglia yelled at the Delta pilot to make collision avoidance maneuvers, adding, "I think
light 175 Light or visible light is electromagnetic radiation that can be perceived by the human eye. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terah ...
has been hijacked. I don’t know his intentions. Take any evasive action necessary." Moments before Flight175 crashed, it narrowly avoided colliding with
Midwest Express Midwest Airlines (formerly Midwest Express) was a U.S.-based airline headquartered in Oak Creek, Wisconsin, that operated from Milwaukee Mitchell International Airport between 1984 and 2010. For a short time, it also operated as a brand of ...
Flight7, which was flying from Milwaukee to New York.


Calls

Flight attendant Robert Fangman and passengers Peter Hanson and Brian David Sweeney made phone calls from GTE
airphone Air-ground radiotelephone service is a system which allows voice calls and other communication services to be made from an aircraft to either a satellite or land based network. The service operates via a transceiver mounted in the aircraft on des ...
s in the rear of the aircraft. Airphone records also indicate that passenger Garnet Bailey made four phone call attempts to his wife. At 08:52, Robert Fangman called a United Airlines maintenance office in San Francisco and spoke with Marc Policastro. Fangman reported the hijacking and said the hijackers were likely flying the plane. He mentioned that both pilots were dead and that a flight attendant had been stabbed. After a minute and 15 seconds, the call was disconnected. Policastro subsequently made attempts to contact the aircraft's cockpit using the Aircraft Communication Addressing and Reporting System (ACARS) message system. He wrote, "I heard of a reported incident aboard your acft ircraft Plz verify all is normal." He received no reply. Brian David Sweeney tried calling his wife, Julie, at 08:59, but ended up leaving a message letting her know the plane had been hijacked. He then called his parents at 09:00 and spoke with his mother, Louise. Sweeney told his mother about the hijacking and mentioned that passengers were considering storming the cockpit and taking control of the aircraft. Concerned that the hijackers would return, he informed her that he might have to hang up quickly. After saying their goodbyes, he hung up. At 08:52, Peter Hanson called his father, Lee Hanson, in Easton, Connecticut. Hanson was traveling with his wife, Sue, and their two-year-old daughter, Christine, the youngest victim of the September 11 attacks. The family was originally seated in Row 19, in seats C, D, and E; however, Peter placed the call to his father from seat 30E. Speaking softly, Hanson said the hijackers had commandeered the cockpit, a flight attendant had been stabbed, and that possibly someone else in the front of the aircraft had been killed. He also said the plane was flying erratically. Hanson asked his father to contact United Airlines, but Lee could not get through and instead called the police. Peter Hanson made a second phone call to his father at 09:00:
It's getting bad, Dad. A stewardess was stabbed. They seem to have knives and
Mace Mace may refer to: Spices * Mace (spice), a spice derived from the aril of nutmeg * '' Achillea ageratum'', known as English mace, a flowering plant once used as a herb Weapons * Mace (bludgeon), a weapon with a heavy head on a solid shaft used ...
. They said they have a bomb. It's getting very bad on the plane. Passengers are throwing up and getting sick. The plane is making jerky movements. I don't think the pilot is flying the plane. I think we are going down. I think they intend to go to Chicago or someplace and fly into a building. Don't worry, Dad. If it happens, it'll be very fast... Oh, my God... oh, my God, oh, my God.
As the call abruptly ended, Hanson's father heard a woman screaming. He then switched on the television and witnessed as the plane struck the South Tower.


Crash

At 08:58, Flight175 was over New Jersey at 28,500 feet, heading toward New York City. In the five minutes from approximately 08:58 when Shehhi completed the final turn toward New York City until the moment of impact, the plane was in a sustained power dive, descending more than 24,000 feet in 5minutes 4seconds, at an average rate of over 5,000 feet per minute. Bottiglia reported he and his colleagues "were counting down the altitudes, and they were descending, right at the end, at 10,000 feet per minute. That is absolutely unheard of for a commercial jet." As the plane approached New York City, Shehhi would have seen the fire and smoke pouring from the North Tower in the distance. The aircraft was in a banking left turn in its final moments, as it appeared the plane might have otherwise missed the building or merely scraped it with a wing. Therefore, those who were on the left side of the plane would also have had a clear view of the towers approaching, with one burning. At 09:01, two minutes before impact as Flight175 continued its descent into Lower Manhattan, the New York Center alerted another nearby Air Traffic Facility responsible for low-flying aircraft, which was able to monitor the aircraft's path over New Jersey, and then over
Staten Island Staten Island ( ) is a borough of New York City, coextensive with Richmond County, in the U.S. state of New York. Located in the city's southwest portion, the borough is separated from New Jersey by the Arthur Kill and the Kill Van Kull an ...
and Upper New York Bay in its final moments. At 09:03, Flight 175 crashed nose-first into the southern façade of the South Tower of the World Trade Center at over , striking through floors 77 and 85 with approximately of jet fuel on board. By the time Flight 175 struck the South Tower, multiple media organizations were already covering the crash of Flight11, which had hit the North Tower 17 minutes earlier. The image of Flight175's crash was thus caught on video from multiple vantage points on live television and amateur video, while approximately a hundred cameras captured Flight175 in photographs before it crashed. Video footage of the crash was replayed numerous times in news broadcasts on the day of the attacks and in the following days, before major news networks put restrictions on use of the footage. The initial assumption by many was that Flight 11's crash into the North Tower had been an accident, a mistaken belief that also hindered the process of immediately evacuating the South Tower after the castastrophic damage done to the North. The sight of Flight 175 deliberately crashing into the South Tower on live TV less than 20 minutes after the first impact confirmed to the entire world it was a terrorist attack. After the plane penetrated through the tower, part of the plane's landing gear and fuselage came out the north side of the tower and crashed through the roof and two of the floors of 45–47 Park Place, between
West Broadway West Broadway is a north-south street in the New York City borough of Manhattan, separated into two parts by Tribeca Park. The northern part begins at Tribeca Park, near the intersection of Avenue of the Americas (Sixth Avenue), Walker Stre ...
and Church Street, north of the former World Trade Center. Three floor beams of the top floor of the building were destroyed, causing major structural damage.


Collapse

Unlike at the North Tower, one of the three stairwells (A) was still intact after Flight175 crashed into the South Tower. This was because the plane struck the tower offset from the center and not centrally as Flight11 in the North Tower had done. Only 18 people passed the impact zone through the available stairway and left the South Tower safely before it collapsed, although the 9/11 Commission speculated that there may have been others who were in the process of descending from above the point of impact, only to be caught in the collapse before they could escape. On the 81st floor, only one person survived:
Stanley Praimnath Stanley Praimnath (born October 27, 1956) is a survivor of the attacks on the World Trade Center on September 11, 2001. He worked as an executive for Fuji Bank on the 81st floor of the South Tower (WTC 2), the second tower struck that day. He wa ...
, whose office was sliced by the wing of the plane. He witnessed Flight175 coming toward him. One of the wings sliced through his office and wound up wedged in a doorway about away from him. No one who was at, above or immediately below the impact zone in the North Tower was able to escape. With approximately 600 people at or above Floor 77, it is estimated that around half of them were killed instantly at the moment of impact. Although not necessarily trapped by the damage done by Flight 175’s impact, the roughly 300 survivors of the crash were either unaware of or unable to escape using the single intact stairwell and subsequently died from smoke inhalation, fires, or the eventual collapse. The smoke and flames also compelled at least three people to jump to their deaths from the upper floors of the South Tower, inadvertently causing the death of another man at street level. Some people above the impact zone made their way upward toward the roof in hopes of a helicopter rescue. However, access doors to the roof were locked; in any case, thick smoke and intense heat prevented rescue helicopters from landing. Flight 175's crash into the South Tower was faster and lower down than that of the North Tower, compromising its structural integrity more. With 25 floors above the South Tower's impact zone compared to the North Tower's 11, there was far more structural weight pressing down on a damaged section of the building on fire. The South Tower collapsed at 09:58:59, after burning for 55 minutes, being the first of the two skyscrapers to collapse despite being the second to be hit, and only burning for around half the amount of time as the North Tower did before it too fell.


Aftermath

The
flight recorder A flight recorder is an electronic recording device placed in an aircraft for the purpose of facilitating the investigation of aviation accidents and incidents. The device may often be referred to as a "black box", an outdated name which has b ...
for Flight175, as with Flight11's, was never found. Some debris from Flight175 was recovered nearby, including landing gear found on top of a building on the corner of West Broadway and Park Place, an engine found at Church and Murray Street, and a section of the fuselage which landed on top of
5 World Trade Center 5 World Trade Center (5 WTC; also referred to as 130 Liberty Street) is a planned skyscraper at the World Trade Center in Lower Manhattan, New York City. The site is across Liberty Street, to the south of the main World Trade Center site. In ...
. In April 2013, a piece of the inboard wing flap mechanism from a Boeing 767 was discovered wedged between two buildings at Park Place. During the recovery process, small fragments were identified from some passengers on Flight175, including a piece of bone belonging to Peter Hanson, and small bone fragments of Lisa Frost. In 2008, the remains of Flight175 passenger Alona Abraham were identified using DNA samples. Remains of many others aboard Flight175 were never recovered. Shortly after September 11, the number for future flights on the same route was changed from 175 to 1525. Since then, United Airlines has renumbered and rescheduled all flights from Boston to Los Angeles. United Airlines Flight311 now operates the Boston to LAX route, leaving at 08:30 and is operated by a
Boeing 737 MAX 9 The Boeing 737 MAX is the fourth generation of the Boeing 737, a narrow-body aircraft, narrow-body airliner manufactured by Boeing Commercial Airplanes (BCA), a division of American company Boeing. It succeeds the Boeing 737 Next Generation (NG ...
. It was reported in May 2011 that United was reactivating flight numbers 175 and 93 as a codeshare operated by Continental, sparking an outcry from some in the media and the
labor union A trade union (labor union in American English), often simply referred to as a union, is an organization of workers intent on "maintaining or improving the conditions of their employment", ch. I such as attaining better wages and benefits ( ...
representing United pilots. However, United said the reactivation was a mistake and said the numbers were "inadvertently reinstated", and would not be reactivated. The names of the victims of Flight175 are inscribed at the National September 11 Memorial & Museum. The federal government provided financial aida minimum of $500,000for the families of victims who died in the attack. Individuals who accepted funds from the government were required to forfeit their ability to sue any entity for damages. More than $7 billion has been paid out to victims by the September 11th Victim Compensation Fund, although that figure includes damages to those who were injured or killed on the other hijacked flights or the towers. In total, lawsuits were filed on behalf of 96 people against the airline and associated companies. The vast majority were settled under terms that were not made public, but the total compensation is estimated to be around $500 million. Only one lawsuit progressed to a civil trial; a wrongful death filing by the family of Mark Bavis against the airline, Boeing, and the airport's security company. This was eventually settled in September 2011. US President George Bush, other top officials, and various government agencies were also sued by Ellen Mariani, widow of passenger Louis Neil Mariani. Her cases were deemed to be frivolous. File:FEMA - 12390 - Photograph by Gene Corley taken on 10-25-2001 in New York.jpg, A piece of fuselage on the roof of 5World Trade Center File:Engine parts of flight 175.jpg, Airplane engine parts from Flight175 File:4.28.12Flight175PanelS-2ByLuigiNovi3.jpg, Panel S-2 of the National September11 Memorial & Museum's South Pool, one of three on which the names of victims from Flight175 are inscribed


See also

* American Airlines Flight 11 *
American Airlines Flight 77 American Airlines Flight 77 was a scheduled American Airlines domestic transcontinental passenger flight from Washington Dulles International Airport in Dulles, Virginia, to Los Angeles International Airport in Los Angeles, California. The Boe ...
* United Airlines Flight 93


References


Notes


Citations


Sources

* * * * * * * * *


External links


The Final 9/11 Commission Report

CNN September 11 Memorial page, with passenger and crew listsArchive



Picture of aircraft Pre 9/11

September 11, 2001 archive of United Airlines site with condolences for deceasedArchive

Page with additional information, from September 12, 2001Archive
{{DEFAULTSORT:United Airlines Flight 0175 2001 fires in the United States 2001 in New York City 2001 in Massachusetts Accidents and incidents involving the Boeing 767 Aircraft hijackings in the United States Airliner accidents and incidents caused by hijacking Airliner accidents and incidents in New York City Airliner accidents and incidents involving deliberate crashes Airliners involved in the September 11 attacks Attacks in the United States in 2001 Aviation accidents and incidents in the United States in 2001 Disasters in New York City Filmed murder–suicides Islamic terrorism in the United States Mass murder in New York (state) Murder–suicides in New York City Murder in New York City Mass murder in 2001 2001 murders in the United States Logan International Airport Terrorist incidents in the United States in 2001
175 Year 175 ( CLXXV) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Piso and Iulianus (or, less frequently, year 928 ''Ab urbe condita ...
World Trade Center Aviation accidents and incidents in 2001 Mass murder in New York City