Ground incident report released Published Aug. 22, 2005 LANGLEY AIR FORCE BASE, Va. (AFPN) -- The Failure of two hinge blades connecting sections of a portable tower caused it and a 470-pound camera mounted on top of the tower to collapse into a building at Bolling Air Force Base, D.C., on Dec. 23, Air Force officials said Aug. 19.The camera fell through the metal roof of the Joint Air Defense Operations Center at Bolling, seriously injuring one individual, while another person received a head abrasion. The camera, tower and building all sustained damages totaling about $512,700.The camera mounted on the tower was designed to help monitor aircraft in the National Capital Region.According to the investigation board, the contractor's lack of training to operate the tower contributed to the mishap. (Courtesy of Air Combat Command News Service)