U.S. Staff Sgt. Daniel Salazar, 56th Maintenance Group hydrazine Mobile Training Team instructor, monitors Chilean Air Force members as they properly record the weight of a hydrazine tank at Los Condores Air Base, Chile, Nov. 13, 2018. Hydrazine is a back-up fuel used in F-16 Fighting Falcons that allows a pilot to regain control in the event of an electrical or hydraulic failure. When the hydrazine is released it creates a chemical reaction that allows the pilot to manually maneuver the aircraft in order to land it safely. (U.S. Air Force photo by Tech. Sgt. Angela Ruiz)