Master Sgt. Anthony Cox, 379th Expeditionary Maintenance Squadron team lead, draws a diagram of a U.S. Air Force F-16 during the classroom portion of “hot pit” refueling training, Prince Sultan Air Base, Kingdom of Saudi Arabia, April 28, 2021. Hot pit refueling is where maintainers refuel an aircraft while the engine is still running, allowing the aircraft to safely and quickly return to flying. (U.S. Air Force Photo by Senior Airman Samuel Earick)