U.S. Air Force Chaplain John Schuck, 66th Air Base Group, Hanscom Air Force Base, Mass., holds church service during Global Medic 2011 and Warrior 91 11-01 at Fort Hunter Liggett, Calif., May 21, 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.