U.S. Air Force Staff Sgt. Steven Frost (right), 42nd Aerial Port Squadron, gives directions to Airman 1st Class Keith Hayes (middle), 36th Aeromedical Evacuation Squadron, and Senior Airman Kelby Ramer (left), 919th Logistics Readiness Squadron, before a C-130 Hercules aircraft lands at Fort Hunter Liggett, Calif., June 13, 2012. GLOBAL MEDIC 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.