U.S. Air Force Staff Sgt. Martin Duran, an aeromedical technician with the 446th Aeromedical Evacuation Squadron, checks the status of a simulated casualty during an aeromedical evacuation mission aboard a C-17 Globemaster III aircraft at Schoonover Field, Fort Hunter Liggett, Calif., May 21, 2011, in support of Global Medic 2011 and Warrior 91 11-01. Global Medic is a joint field training exercise for theater aeromedical evacuation system and ground medical components designed to replicate all aspects of combat medical service support. (U.S. Air Force photo by Staff Sgt. Donald R. Allen/Released)