Ground Zero, Sept. 14, 2001
View of Ground Zero, New York City, N.Y., Sept. 14, 2001. On Sept. 11, 2001, four coordinated terrorist attacks were carried out in the United States using U.S. passenger airliners with two of the attacks on One and Two World Trade Centers. (U.S. Air National Guard photo by Tech. Sgt. Mark C. Olsen/Released)