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
Construction of the Virginia approaches to Arlington Memorial Bridge begin construction, but it ended after the county election in November 1931 left supervisors safe in office for another two years. Arlington County engineers quickly called the Washington Boulevard route south of the cemetery inappropriate. The Washington Boulevard route received a significant boost when, on January 27, 1933, Arlington County, the NCPC, and the United States Department of War reached an agreement on rights-of-way along the route. The agreement gave the county a right-of-way across Fort Meyer and the southwestern tip of Arlington National Cemetery and another right-of-way from the cemetery to Mount Vernon Memorial Parkway across War Department land.