U.S. Air Force Staff Sgt. Corey Cochram, loadmaster, from the 6th Airlift Squadron, Joint Base McGuire-Dix-Lake Hurst, N.C., gives a signal for an adverse terrain forklift to back up from the ramp of a C-17 Globemaster III during a field exercise at the Joint Readiness Training Center (JRTC), Fort Polk, La., March 14, 2014. Service members at JRTC 14-05 are educated in combat patient care and aeromedical evacuation in a simulated combat environment. (U.S. Air Force photo by Staff Sgt Joseph Araiza/Released)