U.S. Military Humvees convoy towards Forward Operating Base 8J, Fort Hunter Liggett, Calif., May 15, 2011, in support of Global Medic 2011. 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)