A U.S. Airman assigned to the 455th Expeditionary Maintenance Squadron and an F-16 Fighting Falcon pilot assigned to the 555th Expeditionary Fighter Squadron go over a pre-flight inspection before a combat sortie from Bagram Airfield, Afghanistan, Sept. 22, 2015. The F-16 is a multi-role fighter aircraft that is highly maneuverable and has proven itself in air-to-air and air-to-ground combat. (U.S. Air Force photo by Tech. Sgt. Joseph Swafford/Released)