Senior Airman Douglas Prewitt, 621st Contingency Response Wing, Joint Base McGuire-Dix-Lakehurst, N.J., marshals a C-17 Globemaster III at the Geronimo landing zone during training at Joint Readiness Training Center, Fort Polk, La., Jan. 16, 2014. Service members at JRTC 14-03 are educated in combat patient care and aeromedical evacuation in a simulated combat environment. (U.S. Air Force photo by Master Sgt. John R. Nimmo, Sr./Released)