U.S. Air Force Senior Airman Jonathan Gutierrez, a 52nd Logistics Readiness Squadron fuels distribution operator, ensures valves are in the proper position for a fuel stand operation at Spangdahlem Air Base, Germany, Feb. 16, 2016. Fuel stand operations consist of filling up the fuel trucks with Jet Propellant 8 for the aircraft. (U.S. Air Force photo by Staff Sgt. Christopher Ruano/Released)