History of the United States (1991–2008) South Tower less than twenty minutes later at 9:03 A.M. (EST), resulting in the collapse of both 110 story skyscrapers, and the destruction of the World Trade Center. The third hijacked plane, American Airlines Flight 77, was crashed into the Pentagon (the headquarters of the United States Department of Defense) in Arlington County, Virginia, demolishing a section of the outer southwest facing wall. After discovering that their plane, United Airlines Flight 93, was going to be used as a missile, passengers attempted to regain control of the plane which had been redirected towards Washington, D.C. However, after regaining control from
Streets and highways of Arlington County, Virginia Bridge (U.S. Route 29), the Theodore Roosevelt Bridge (Interstate 66/U.S. Route 50), the Arlington Memorial Bridge, and the 14th Street Bridge complex (Interstate 395/U.S. Route 1). Streets and highways of Arlington County, Virginia This article deals with the streets and highways of Arlington County, Virginia, a suburb of Washington, D.C. in the United States. In 2009, the county maintains of roads. , the total mileage of (primary) state highways in Arlington County was 39.66 (59 km). Arlington County is one of only two counties in Virginia which maintain its own roads (with the exception of primary state highways, including U.S.