Staff Sgt. Joshua Baldwin, 28th Logistics Readiness Squadron refueling maintenance mechanic, repairs a gate valve during scheduled maintenance on a master meter in the fuels shop at Ellsworth Air Force Base, S.D., Oct. 16, 2012. Refueling maintenance Airmen are responsible for maintaining 13 vehicles used to refuel aircraft. (U.S. Air Force photo by Airman 1st Class Kate Thornton-Maurer/Released)