U.S. Army Spc. Robynn Houston, 308th Medical Logistics Company, performs preventive maintenance on a vehicle at Schoonover Field, Fort Hunter Liggett, Calif., May 22, in support of Global Medic 2011 and Warrior 91 11-01. Global Medic is a joint Reserve field training exercise for theater aeromedical evacuation system and ground medical components designed to replicate all aspects of combat medical service support.