U.S. Air Force Staff Sgt. David Rinck, 633rd Logistics Readiness Squadron fuels distribution operator, connects hoses from a Hydrant Mobile Refueler to the underground hydrant system at Langley Air Force Base, Va., Dec. 13, 2013. The underground hydrant system allows fuel to be easily transported to the flightline. Rinck hails from Colora, Md. (U.S. Air Force photo by Senior Airman Teresa Aber/Released)