Arlington National Cemetery is to the north. Just south of the Pentagon are Pentagon City and Crystal City, extensive shopping, business, and high-density residential districts in Arlington. The complex includes eating and exercise facilities as well as meditation and prayer rooms. It is possible for a person to walk between any two points in the Pentagon in less than ten minutes, though the most optimal route may involve a brisk walk, routing through the open-air central courtyard, or both. One way to get to this office would be to go to the second floor, get to the A (innermost) ring, go to and take corridor 3, and then turn left on ring B to get to bay 15. Thus, office 2B315 is on the second floor, B ring, and nearest to corridor 3 (between corridors 2 and 3). Room numbers are given as the floor, concentric ring, and office number (which is in turn the nearest corridor number followed by the bay number). The concourse is on the second floor at the Metro entrance. Subterranean floors in the Pentagon are lettered "B" for Basement and "M" for Mezzanine. There are a number of historical displays in the building, particularly in the "A" and "E" rings.
#2.5 FOOT MINI RAMP PLANS SERIES#
Each numbered radial corridor intersects with the corresponding numbered group of offices (for example, corridor 5 divides the 500 series office block). These corridors radiate out from the central courtyard, with corridor 1 beginning with the Concourse's south end. Office numbers go clockwise around each of the rings, and have two parts: a nearest-corridor number (1 to 10), followed by a bay number (00 to 99), so office numbers range from 100 to 1099.
"E" Ring offices are the only ones with outside views and are generally occupied by senior officials. The concentric rings are designated from the center out as "A" through "E" (with additional "F" and "G" rings in the basement). The south parking lot adjoins the southwest façade, and the west side of the Pentagon faces Washington Boulevard. There is also a concourse on the southeast side of the second floor of the building, which contains a mini-shopping mall.
The main entrance for visitors is on the southeast side, as are the Pentagon Metro station and the bus station. A stepped terrace on the River Entrance leads down to the lagoon and a landing dock was used until the late 1960s to ferry personnel between Bolling Air Force Base and the Pentagon. The River Entrance, which features a portico projecting out twenty ft (6 m), is on the northeast side, overlooking the lagoon and facing Washington. On the north side of the building, the Mall Entrance, which also features a portico, leads out to a 600 ft-long (180 m) terrace that is used for ceremonies. Starting with the north side and moving clockwise, its five façade entrances are the Mall Terrace, the River Terrace, the Concourse (or Metro Station), the South Parking, and the Heliport. The Pentagon building spans 28.7 acres (116,000 m 2), and includes an additional 5.1 acres (21,000 m 2) as a central courtyard. An outdoor memorial dedicated to the Pentagon victims of 9/11 opened in 2008. Following the attacks, the western side of the building was repaired, with a small indoor memorial and chapel added at the point of impact. since the burning of Washington during the War of 1812. It was the first significant foreign attack on government facilities in Washington, D.C. Five al-Qaeda hijackers flew American Airlines Flight 77 into the western side of the building, killing themselves and 184 other people: 59 on the airplane and 125 in the Pentagon. In 2001, the Pentagon was damaged during the September 11 attacks. It has five sides, five floors above ground, two basement levels, and five ring corridors per floor with a total of 17.5 mi (28.2 km) of corridors, with a central five-acre (2.0 ha) pentagonal plaza. Some 23,000 military and civilian employees, and another 3,000 non-defense support personnel, work in the Pentagon. The Pentagon is the world's second largest office building, with about 6.5 million square feet (600,000 m 2) of floor space, of which 3.7 million square feet (340,000 m 2) are used as offices. Army Corps of Engineers, which supervised it. 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 U.S. Ground was broken on 11 September 1941, and the building was dedicated on 15 January 1943. The building was designed by American architect George Bergstrom and built by contractor John McShain. military, the phrase The Pentagon is often used as a metonym for the Department of Defense and its leadership. It was constructed on an accelerated schedule during World War II. 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.
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