U.S. Air Force Senior Airman Ryan Versen, 52nd Aircraft Maintenance Squadron assistant dedicated crew chief, left, trains pilots how to refuel an F-16 Fighting Falcon at Spangdahlem Air Base Germany, Dec. 11, 2020. The training provided a hands-on experience for pilots on how to refuel a jet in case a crew chief is not present. (U.S. Air Force photo by Senior Airman Chance D. Nardone)