U.S. Air Force Staff Sgts. Corie Flores and Ryan Vottero, 633rd Security Forces Squadron Base Defense Operations Center operators clear a mock control tower building during Combat Readiness Training at Langley Air Force Base, Va., June 27, 2016. During the two-day course, SF students were taught; troop leading procedures, base security operations, detainee/enemy prisoner of war procedures, team movement procedures, land navigation, expeditionary entry control point operations, self-aid and buddy care. (U.S. Air Force photo by/Tech. Sgt. Daylena S. Ricks)