Airman 1st Class James Trainer, 19th Component Maintenance Squadron aircraft fuels systems repair apprentice, tightens a fuel pipe on a C-130 aircraft training wing July 16, 2010, at Little Rock Air Force Base, Ark. The majority of an aircraft fuels systems repair Airman's duties take place in the wing of aircraft they maintain. (U.S. Air Force Photo/Senior Airman Steele C. G. Britton)