Master Sgt. Bernard Matthews, a flying crew chief from the 315th Aircraft Maintenance Squadron at Joint Base Charleston, S.C. conducts a walk-around inspection of a C-17 Globemaster III on a recent mission to Central America. The flying crew chief program places maintainers on aircraft as part of the crew to manage general maintenance issues throughout the jet. The 315th Airlift Wing provides a variety of missions to Central and South America. (U.S. Air Force Photo by Lt. Col. Wayne Capps)