More than 230,000 pounds of steel from the World Trade Center are draped by an American flag Aug. 7, 2011, at Buckley Air Force Base, Colo. These pieces will be used in memorials throughout the state to commemorate the 10th anniversary of the 9/11 attacks. Airman 1st Class Phillip Houk

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Keywords: .., 11, 9/11, afb, air, attacks, base, buckley, center, colorado, defense, denver, force, memorial, military, sept., trade, transfer, united, usa, usaf, war, world