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 Sinclair, who proposed a series of roads radiating outward from the bridge. Multiple routes were considered by Arlington County and Virginia officials to implement the Sinclair plan. At the time, Lee Boulevard was being built from Seven Corners eastward toward Arlington National Cemetery. Construction officials announced in July 1926 that Lee Boulevard. would go south around Arlington National Cemetery, then proceed up the Potomac River shoreline to either connect with Arlington Memorial Bridge near the cemetery's main gate or bridge the Boundary Channel to connect with the roads on Columbia Island. However, in December 1926, the CFA learned that Arlington