U.S. Air Force aeromedical personnel check their geographical grid coordinates while concealed in brush, during a downed aircraft scenario, while participating in Exercise GLOBAL MEDIC 2012 and Warrior Exercise 91 12-01 at Fort Hunter Liggett, Calif., June 22, 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. WAREX gives participating units an opportunity to rehearse military maneuvers and tactics such as security, convoy operations and quick reaction drills during simulated enemy attacks.