Airmen of the 18th Component Maintenance Squadron Propulsion Flight perform tasks that enable Kadena Air Base F-15s to fly for three years before needing an engine overhaul. More than 200 engines are maintained by this unit, providing support for Kadena F-15s as well as A-10s from Osan Air Base, Korea. (U.S. Air Force photo/Staff Sgt. Christopher Hummel)