U.S. Air Force aeromedical evacuation personnel attend a combat survival training refresher course during Exercise Global Medic/Warrior Exercise 91 12-01 at Fort Hunter Liggett, Calif., June 18, 2012. Warrior Exercise gives participating units an opportunity to rehearse military maneuvers an tactics such as security, convoy operations and quick reaction drills during simulated enemy attacks. 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.