Tech Sgt. John Heaton, 363rd Training Squadron armament apprentice course instructor, observes Airman 1st Class Peter Valela and Airman Colby Cox, 363rd TRS armament apprentice course students, transport an ammunition drum to an F-16 Falcon simulator using a lift crane at Sheppard Air Force base, Texas, Feb. 15, 2018. Heaton’s class is in block 11 of 12 and scheduled to graduate March 7. (U.S. Air Force photo by Alan R. Quevy)