U.S. Air Force Senior Airman Timothy Kilts, 633rd Logistics Readiness Squadron vehicle and vehicular equipment maintenance journeyman, replaces a tractor tire at Langley Air Force Base, Va., Dec. 11, 2013. Vehicle maintenance Airmen work with a wide range of government vehicles, including police sedans, fire trucks, utility trucks and tractor trailers. Kilts hails from Mexico, N.Y. (U.S. Air Force photo by Senior Airman Teresa Aber/Released)