U.S. Air Force Staff Sgt. Steven Frost (left), 42nd Aerial Port Squadron, Senior Airman Kelby Ramer (middle), 919th Logistics Readiness Squadron, and Airman 1st Class Keith Hayes (right), 36th Aeromedical Evacuation Squadron, walk toward a C-130 Hercules aircraft to unload at Fort Hunter Liggett, Calif., June 13, 2012. Exercise Global Medic 2012 is a joint field training exercise for theater aeromedical evacuation systems and ground medical components designed to replicate all aspects of combat medical service support.