U.S. Air Force Senior Airman Riley St. John guides an inert 500 pound general purpose bomb into the bomb bay of a B-52H Stratofortress during weapons load crew training on Aug. 3, 2014, Barksdale Air Force Base, La. Crews are required to participate in the training to acquire or maintain certification for loading live munitions on the aircraft. (U.S. Air Force photo by Tech. Sgt. Ted Daigle/Released)