Master Sgt. Eric Walker (second from left), a loadmaster with the 315th Airlift Control Flight at Joint Base Charleston, S.C., teams up with Army Sgt. Brad Calhoun (right) to pull tight on a chain to secure an M1A1SA Abrams main battle tank to the floor of a C-17 Globemaster III Friday at Wright Army Airfield, Ga. C-17's from JB Charleston, S.C., and Wright-Patterson Air Force Base, Ohio, transported four tanks from Wright AAF to McEntire Air National Guard Base, S.C., in support of a tank movement for the 1/118th CAB. (U.S. Air Force photo by Staff Sgt. Rashard Coaxum/released)