Ready to fight, day or night
U.S. Air Force Airman 1st Class Samuel Fernandez, 20th Aircraft Maintenance Squadron tactical aircraft maintainer, services the accessory drive gearbox (ADG) of an F-16CM Fighting Falcon at Shaw Air Force Base, S.C., Aug. 17, 2016. The ADG transfers power to essential accessories for the operation of the engine, such as fuel pumps. (U.S. Air Force photo by Airman 1st Class Kelsey Tucker)