U.S. Air Force Staff Sgt. David Rinck, 633rd Logistics Readiness Squadron fuels distribution operator, connects an hoses from a Hydrant Mobile Refueler to the underground hydrant system at Langley Air Force Base, Va., Dec. 13, 2013. The three-mile-long 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)