The Pentagon

PentagonPentagon buildingUS PentagonPentagon Hall of HeroesAir Force HeadquartersPentagon (United States)Pentagon ReservationPentagon's Hall of Heroes911 attackA pentagonal building
The Pentagon is the headquarters building of the United States Department of Defense.wikipedia
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United States Department of Defense

Department of DefenseU.S. Department of DefenseUS Department of Defense
The Pentagon is the headquarters building of the United States Department of Defense.
Headquartered at the Pentagon in Arlington, Virginia, just outside Washington, D.C., the DoD's stated mission is to provide "the military forces needed to deter war and ensure our nation's security".

Leslie Groves

Leslie R. Groves, Jr.Leslie R. GrovesLeslie R. Groves Jr.
General Brehon Somervell provided the major motivating power behind the project; Colonel Leslie Groves was responsible for overseeing the project for the U.S. Army.
Lieutenant General 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 top secret research project that developed the atomic bomb during World War II.

George Bergstrom

George Edwin BergstromEdwin BergstromG. Edwin Bergstrom
Located in Arlington County, Virginia, across the Potomac River from Washington, D.C., the building was designed by American architect George Bergstrom and built by contractor John McShain.
George Edwin Bergstrom (March 12, 1876 – June 17, 1955) was an American architect who designed The Pentagon in Arlington County, Virginia.

List of largest office buildings

largest office buildingList of tallest office buildings in the world
The Pentagon is the world's largest office building, with about 6500000 ft2 of space, of which 3700000 ft2 are used as offices.

Metonymy

metonymmetonymicmetonymically
As a symbol of the U.S. military, the phrase The Pentagon is also often used as a metonym for the Department of Defense and its leadership.

John McShain

Barclay StableJohn McShain, Inc.Mary McShain (née Mary J. Horstmann)
Located in Arlington County, Virginia, across the Potomac River from Washington, D.C., the building was designed by American architect George Bergstrom and built by contractor John McShain.
Most notably, the company built or was the prime contractor for a number of landmark structures including The Pentagon, the Jefferson Memorial, the John F. Kennedy Center for the Performing Arts, the Library of Congress annex, Washington National Airport, and the 1949–52 reconstruction of the White House.

Brehon B. Somervell

Brehon Somervell
General Brehon Somervell provided the major motivating power behind the project; Colonel Leslie Groves was responsible for overseeing the project for the U.S. Army.
The most enduring of these projects was the Pentagon, which is today one of the most recognizable buildings in the world.

American Airlines Flight 77

Flight 77attack on the Pentagonthe Pentagon
On September 11, 2001, exactly 60 years after the building's construction began, American Airlines Flight 77 was hijacked and flown into the western side of the building, killing 189 people (59 victims and the five perpetrators on board the airliner, as well as 125 victims in the building), according to the 9/11 Commission Report.
They deliberately crashed the plane into the Pentagon in Arlington County, Virginia, near Washington, D.C., killing all 64 people on board, including the five hijackers and six crew, as well as 125 people in the building.

Pentagon station

PentagonPentagon Metro station
The main entrance for visitors is on the southeast side, as are the Pentagon Metro station and the bus station.
Pentagon Transit Center is a split platform station on the Washington Metro located adjacent to The Pentagon in Arlington, Virginia.

Arlington County, Virginia

Arlington, VirginiaArlingtonArlington County
Located in Arlington County, Virginia, across the Potomac River from Washington, D.C., the building was designed by American architect George Bergstrom and built by contractor John McShain. Just south of the Pentagon are Pentagon City and Crystal City, extensive shopping, business, and high-density residential districts in Arlington.
Due to the county's proximity to downtown Washington, D.C., Arlington is home to the Pentagon, Reagan National Airport, and Arlington National Cemetery.

Pentagon City

Jefferson DistrictPentagon City, Arlington County, VirginiaPentagon City, Arlington, Virginia
Just south of the Pentagon are Pentagon City and Crystal City, extensive shopping, business, and high-density residential districts in Arlington.
Pentagon City is an unincorporated neighborhood (also called an "urban village") located in the southeast portion of Arlington County, Virginia, near The Pentagon and Arlington National Cemetery.

Crystal City, Arlington, Virginia

Crystal CityCrystal City, VirginiaCrystal City, Arlington
Just south of the Pentagon are Pentagon City and Crystal City, extensive shopping, business, and high-density residential districts in Arlington.
Crystal City includes offices of numerous defense contractors, the United States Department of Labor, the United States Marshals Service and many satellite offices for The Pentagon.

Pentagon road network

interchangeMixing Bowl
The Pentagon is surrounded by the relatively complex Pentagon road network.
The Pentagon road network is a system of highways, mostly freeways, built by the United States federal government in the early 1940s to serve the Pentagon in northern Virginia.

Washington Boulevard (Arlington)

Washington BoulevardWashington BlvdWashington Boulevard Trail
The south parking lot adjoins the southwest facade, and the west side of the Pentagon faces Washington Boulevard.
It then runs past The Pentagon and Arlington National Cemetery before turning north and west from I-395, crossing Columbia Pike and passing alongside Fort Myer.

Main Navy and Munitions Buildings

Munitions BuildingNavy Communication Annex DispensaryMain Navy Building
Before the Pentagon was built, the United States Department of War was headquartered in the Munitions Building, a temporary structure erected during World War I along Constitution Avenue on the National Mall.
The Department of War headquarters remained in the Munitions Building, through the early years of World War II, until 1942, when some space became available in the Pentagon, which was under construction.

Ground zero

area directly affected by the explosionGround Zero CafeGround Zero site
The central five-acre (20,000 m 2 ) pentagonal plaza is nicknamed "ground zero" on the presumption that it would be a prime target in a nuclear war.
During the Cold War, The Pentagon, the headquarters of the United States Department of Defense in Arlington County, Virginia, was an assured target in the event of nuclear war.

Aircraft hijacking

hijackedhijackinghijack
On September 11, 2001, exactly 60 years after the building's construction began, American Airlines Flight 77 was hijacked and flown into the western side of the building, killing 189 people (59 victims and the five perpetrators on board the airliner, as well as 125 victims in the building), according to the 9/11 Commission Report.
The first two planes were deliberately crashed into the Twin Towers of the World Trade Center and the third was crashed into The Pentagon building.

Hoover Field

Washington Hoover Airport
Possible sites for the building included the Department of Agriculture's Arlington Experimental Farm, adjacent to Arlington National Cemetery, and the obsolete Hoover Field site.
It was located in Arlington, Virginia, near the intersection of the Highway Bridge and the Mount Vernon Memorial Parkway, where The Pentagon and its northern parking lots now stand.

Nuclear warfare

nuclear warnuclear attacknuclear
The central five-acre (20,000 m 2 ) pentagonal plaza is nicknamed "ground zero" on the presumption that it would be a prime target in a nuclear war.
Journalist Dmitry Kiselyov lists what he claims are the targets in the United States, which includes The Pentagon, Camp David, Fort Ritchie, McClellan Air Force Base, and Jim Creek Naval Radio Station.

United States Armed Forces

United States militaryU.S. militaryUS military
As a symbol of the U.S. military, the phrase The Pentagon is also often used as a metonym for the Department of Defense and its leadership.

Virginia

Commonwealth of VirginiaVAState of Virginia
The War Department, which was a civilian agency created to administer the U.S. Army, was spread out in additional temporary buildings on the National Mall, as well as dozens of other buildings in Washington, D.C., Maryland and Virginia.
Also among the federal developments was the Pentagon, built during World War II as the headquarters for the Department of Defense.

Harry S Truman Building

Harry S. Truman BuildingNew War Department Buildingheadquarters
In the late 1930s, a new War Department Building was constructed at 21st and C Streets in Foggy Bottom but, upon completion, the new building did not solve the department's space problem and ended up being used by the Department of State.
Congress appropriated funds for construction of the Pentagon early in 1941, the same year the first phase of the building was completed.

Reagan National Airport

Ronald Reagan Washington National AirportWashington National AirportNational Airport
While the project went through the approval process in late July 1941, Somervell selected the contractors, including John McShain, Inc. of Philadelphia, which had built Washington National Airport in Arlington, the Jefferson Memorial in Washington, and the National Naval Medical Center in Bethesda, Maryland, along with Wise Contracting Company, Inc. and Doyle and Russell, both from Virginia.
Located near the present site of the Pentagon, the facility's single runway was crossed by a street; guards had to stop automobile traffic during takeoffs and landings.

Virginia State Route 244

Columbia PikeSR 244State Route 244
The Hell's Bottom neighborhood mainly numerous pawnshops, factories, approximately 150 homes, and other buildings around Columbia Pike, was also cleared to make way for the Pentagon.
Known as Columbia Pike, the state highway runs 8.25 mi from SR 236 in Annandale east to SR 27 and Interstate 395 (I-395) at The Pentagon in Arlington.

Arlington Farms

Arlington Experimental Farm
The site originally chosen was Arlington Farms which had a roughly pentagonal shape, so the building was planned accordingly as an irregular pentagon.
However, when construction of the Pentagon began in 1941, it was on the nearby site of the old Washington-Hoover Airport.