U.S. Air Force Staff Sgt. Rene Carrillo, medical technician with the 452nd Aeromedical Staging Squadron, secures a simulated casualty to a stretcher for medical transport at Fort Hunter Liggett, Calif., May 22, 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. Warrior Exercise gives participating units an opportunity to rehearse military maneuvers and tactics such as security, convoy operations and quick reaction drills during simulated enemy attacks. (U.S. Air Force photo by Senior Airman Raymond A. Estes/Released)