The Pentagon
The Pentagon is the headquarters building of the United States Department of Defense, in Arlington County, Virginia, across the Potomac River from Washington, D.C. The building was constructed on an accelerated schedule during World War II. As a symbol of the United States Armed Forces, U.S. military, the phrase ''The Pentagon'' is often used as a metonym for the Department of Defense and its leadership. The building was designed by American architect George Bergstrom and built by contractor John McShain. Ground was broken on 11 September 1941, and the building was dedicated on 15 January 1943. General Brehon Somervell provided the major impetus to gain Congressional approval for the project. Colonel Leslie Groves was responsible for overseeing the project for the United States Army Corps of Engineers, U.S. Army Corps of Engineers, which supervised it. The Pentagon is List of largest office buildings, the world's second-largest office building, with about of floor space, of ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Potomac River
The Potomac River () is in the Mid-Atlantic (United States), Mid-Atlantic region of the United States and flows from the Potomac Highlands in West Virginia to Chesapeake Bay in Maryland. It is long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map. Retrieved August 15, 2011 with a Drainage basin, drainage area of , and is the fourth-largest river along the East Coast of the United States. More than 6 million people live within its drainage basin, watershed. The river forms part of the borders between Maryland and Washington, D.C., on the left descending bank, and West Virginia and Virginia on the right descending bank. Except for a small portion of its headwaters in West Virginia, the #North Branch Potomac River, North Branch Potomac River is considered part of Maryland to the low-water mark on the opposite bank. The South Branch Potomac River lies completely within the state of West Virginia except for its headwaters, which lie i ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Leslie Groves
Leslie Richard Groves Jr. (17 August 1896 – 13 July 1970) was a United States Army Corps of Engineers officer who oversaw the construction of the Pentagon and directed the Manhattan Project, a Classified information#Top_Secret_(TS), top secret research project that developed the atomic bomb during World War II. The son of a Chaplain Corps (United States Army), U.S. Army chaplain, Groves lived at various Army posts during his childhood. In 1918, he graduated fourth in his class at the United States Military Academy at West Point, New York, West Point and was commissioned into the United States Army Corps of Engineers. In 1929, he went to Nicaragua as part of an expedition to conduct a survey for the Inter-Oceanic Nicaragua Canal. Following the 1931 Nicaragua earthquake, 1931 Nicaraguan earthquake, Groves took over Managua's water supply system, for which he was awarded the Nicaraguan Presidential Medal of Merit. He attended the Command and General Staff School at Fort Leavenw ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Pentagon (Washington Metro)
Pentagon station is a split platform station on the Washington Metro located adjacent to The Pentagon in Arlington, Virginia. The station was opened on July 1, 1977, and is operated by the Washington Metropolitan Area Transit Authority. Providing service for both the Blue and Yellow Lines, the station is where the two lines diverge and thus acts as a transfer point. Northbound, both lines rise above ground, with the Blue Line serving the station, and the Yellow Line crossing the Potomac River into the District of Columbia. The station opened on July 1, 1977 with the completion of of rail between National Airport and RFK Stadium. Photography is not allowed anywhere on the station grounds. Bus service Pentagon station is also a major bus hub in northern Virginia. The current bus facility opened in 2001 as part of the Pentagon Renovation Program. * Arlington Transit: 42, 87, 87A, 87P, 87X * DASH: 35, 103, 104 * Fairfax Connector: 306, 393, 394, 395, 396, 598, 599, 698, ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Bolling Air Force Base
Bolling Air Force Base or Bolling AFB was a United States Air Force installation located in Washington, D.C. In 2010, it merged with Naval Support Facility Anacostia to form Joint Base Anacostia–Bolling. From its establishment, the base has served as a joint site for both the Army Air Corps (predecessor to today's Air Force) and Navy aviation and support elements. History Before European colonization, the area where Bolling Air Force Base is located was inhabited by the Nacotchtank, an Algonquian people. The largest village of the Nacotchtank was located just north of the air force base, south of Anacostia Park. Another Nacotchtank village is believed to have existed on the base grounds, where two ossuaries (burial mounds) were discovered in 1936. Other Nacotchtank archaeological sites have been found at Giesboro Point on the Potomac River. The Department of Defense (DOD) has owned the Bolling grounds since 1917, when the tract of land was scouted by William C. Ocker at ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Clockwise
Two-dimensional rotation can occur in two possible directions or senses of rotation. Clockwise motion (abbreviated CW) proceeds in the same direction as a clock's hands relative to the observer: from the top to the right, then down and then to the left, and back up to the top. The opposite sense of rotation or revolution is (in Commonwealth English) anticlockwise (ACW) or (in North American English) counterclockwise (CCW). Three-dimensional rotation can have similarly defined senses when considering the corresponding angular velocity vector. Terminology Before clocks were commonplace, the terms " sunwise" and "deasil", "deiseil" and even "deocil" from the Scottish Gaelic language and from the same root as the Latin "dexter" ("right") were used for clockwise. " Widdershins" or "withershins" (from Middle Low German "weddersinnes", "opposite course") was used for counterclockwise. The terms clockwise and counterclockwise can only be applied to a rotational motion once a side ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Pentagon Memorial
The National 9/11 Pentagon Memorial, or simply the Pentagon Memorial, located just southwest of the Pentagon in Arlington County, Virginia, across the Potomac River from Washington, D.C., is a permanent outdoor memorial to the 184 people who died as victims in the building and on American Airlines Flight 77 during the September 11 attacks. Designed by Julie Beckman and Keith Kaseman of the architectural firm of Kaseman Beckman Advanced Strategies with engineers Buro Happold, the memorial opened on September 11, 2008, seven years after the attack. In addition to the outdoor memorial, the 9/11 Pentagon Memorial is the only one of the three 9/11 attack sites without a dedicated education center (VEC). This means that visitors to the memorial have no place to learn about the historical context and significance of the event, unlike the 9/11 Memorial & Museum in New York and the Flight 93 National Memorial in Shanksville. The Pentagon Memorial Fund is working to build the VEC, wi ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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List Of Major Terrorist Incidents ...
This is a list of major terrorist incidents conducted by violent non-state actors, i.e. excluding state terrorism. Attacks before 1950 Attacks 1950 to 1989 1990s 2000s 2010s 2015 2016 2017 2018 2019 2020s 2021 2022 2023 2024 2025 Other attacks This is a list of terrorist incidents with at least 100 fatalities, that are not included in the chronological timeline. See also *List of terrorist incidents Notes References {{Reflist * Terrorist Terrorism, in its broadest sense, is the use of violence against non-combatants to achieve political or ideological aims. The term is used in this regard primarily to refer to intentional violence during peacetime or in the context of war aga ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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American Battlefield Trust
The American Battlefield Trust is a charitable organization (501(c)(3)) whose primary focus is in the preservation of battlefields of the Revolutionary War, the War of 1812, and the American Civil War, through the acquisition of battlefield land. The American Battlefield Trust was formerly known as the Civil War Trust. On May 8, 2018, the organization announced the creation of the American Battlefield Trust as the umbrella organization for two divisions, the Civil War Trust and the Revolutionary War Trust, which was formerly known as "Campaign 1776". The American Battlefield Trust also promotes educational programs and heritage tourism initiatives to inform the public about these three conflicts and their significance in American history. On May 31, 2018, the Trust announced that with the acquisition of at the Cedar Creek battlefield in the Shenandoah Valley of Virginia, it had reached the milestone of of battlefield land acquired and preserved. Since 1987, the Trust and its ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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War Of 1812
The War of 1812 was fought by the United States and its allies against the United Kingdom of Great Britain and Ireland, United Kingdom and its allies in North America. It began when the United States United States declaration of war on the United Kingdom, declared war on Britain on 18 June 1812. Although peace terms were agreed upon in the December 1814 Treaty of Ghent, the war did not officially end until the peace treaty was ratified by the 13th United States Congress, United States Congress on 17 February 1815. AngloAmerican tensions stemmed from long-standing differences over territorial expansion in North America and British support for Tecumseh's confederacy, which resisted U.S. colonial settlement in the Old Northwest. In 1807, these tensions escalated after the Royal Navy began enforcing Orders in Council (1807), tighter restrictions on American trade with First French Empire, France and Impressment, impressed sailors who were originally British subjects, even those who ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Burning Of Washington
The Burning of Washington, also known as the Capture of Washington, was a successful United Kingdom of Great Britain and Ireland, British Amphibious warfare, amphibious attack conducted by Rear Admiral Sir George Cockburn, 10th Baronet, George Cockburn during Admiral (Royal Navy), Admiral John Borlase Warren, John Warren's Chesapeake campaign. It was the only time since the American Revolutionary War that a foreign power had captured and occupied a List of capitals in the United States#Capitals of the United States, United States capital. Following the defeat of American forces at the Battle of Bladensburg on August 24, 1814, a British army led by Major-General Robert Ross (British Army officer), Robert Ross marched on Washington, D.C. That evening, British soldiers and sailors set fire to multiple public buildings, including the White House, Presidential Mansion, United States Capitol, and Washington Navy Yard. The attack was in part a retaliation for prior American actions i ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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American Airlines Flight 77
American Airlines Flight 77 was a scheduled domestic transcontinental passenger flight from Dulles International Airport in Northern Virginia to Los Angeles International Airport in Los Angeles. The Boeing 757-200 aircraft serving the flight was hijacked by five al-Qaeda terrorists on the morning of September 11, 2001, as part of the September 11 attacks. The hijacked airliner was deliberately crashed into the Pentagon in Arlington County, Virginia, killing all 64 aboard and another 125 in the building. Flight 77 became airborne at 08:20 ET. Thirty-one minutes after takeoff, the attackers stormed the cockpit and forced the passengers and crew to the rear of the cabin, threatening the hostages but initially sparing all of them. Lead hijacker Hani Hanjour assumed control of the aircraft after having undergone extensive flight training as part of his preparation for the attack. In the meantime, two people aboard discreetly made phone calls to family members and relayed inf ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Al-Qaeda
, image = Flag of Jihad.svg , caption = Jihadist flag, Flag used by various al-Qaeda factions , founder = Osama bin Laden{{Assassinated, Killing of Osama bin Laden , leaders = {{Plainlist, * Osama bin Laden{{Assassinated, Killing of Osama bin Laden(1988–2011) * Ayman al-Zawahiri{{Assassinated, Killing of Ayman al-Zawahiri(2011–2022) * Saif al-Adel(''de facto''; 2022–present) , active = {{nowrap, August 11, 1988 – present , allegiance = {{flag, Taliban (1995–present) , ideology = {{Collapsible list , title={{Nbsp , {{Plainlist, * Sunni Islam, Sunni Islamism{{refn, name=Sunni Islamism, {{cite book, editor1-last=Bokhari, editor1-first=Kamran, editor2-last=Senzai, editor2-first=Farid, year=2013, chapter=Rejector Islamists: al-Qaeda and Transnational Jihadism, chapter-url=https://books.google.com/books?id=ThiuAgAAQBAJ&pg=PA101, title=Political Islam in the Age of Democratization, location=New York, publish ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |