Maintaining power for aircraft on the ground
U.S. Air Force Staff Sgt. Brett Wheeler, 446th Maintenance Squadron, powered support systems technician here, works on an Essex B809 diesel generator. The generator provides power for aircraft on the ground. Sergeant Wheeler hails from Clarkston, Wash. and is a powered systems technician with the 62nd Maintenance Squadron in his civilian job. (U.S. Air Force photo by Staff Sgt. Elizabeth Moody)