Maintenance troops
Staff Sgt. Wesley Clark marshals a C-17 Globemaster III into its parking spot at Hickam Air Force Base, Hawaii, Tuesday, Feb. 28, 2006. Sergeant Clark is a crew chief with the 15th Maintenance Group, which is a combined active duty and Air National Guard maintenance group. (U.S. Air Force photo/Tech. Sgt. Shane A. Cuomo)