U.S. Air Force Staff Sgt. Joan Morgan, 633rd Security Forces Squadron installation entry controller, presses an ammunition can during emergency service team tryouts at Langley Air Force Base, Va., Jan. 20, 2015. SFS Airmen were required to lift a 30-pound ammunition can above their head a minimum of 50 times as one of the tasks during the tryouts. (U.S. Air Force photo by Senior Airman Kayla Newman/Released)