Steve Edwards, 458 Airlift Squadron aircraft technician, inspects a C-21A engine, checking for discrepancies like damaged or worn engine wiring, March 18, 2015 at Scott Air Force Base, Ill. The 458 AS aircraft technicians are contractors who work specifically with maintaining the C-21As by checking cleaning the aircraft and their engines. (U.S. Air Force photo/Senior Airman Joshua Eikren)