Tech. Sgt. Eric Overkamp, a member of the 315th Maintenance Group here at Joint Base Charleston, S.C., holds a C-17 Globemaster III engine spark plug after removing it during a post flight maintenance check yesterday on the aircraft ramp here. Overkamp provided maintenance support along with other 315th MXG members yesterday while the 437th Maintenance Group took part in the active duty’s wingman day activities. (U.S. Air Force photo by Staff Sgt. Rashard Coaxum)