U.S. Air Force Master Sgt. Kenneth Horner assigned to the 335 Air Refueling Squadron, March Air Reserve Base, Calif., briefs U.S. Air Force Aeromedical Evacuation members on Egress procedures for the C141 aircraft during Exercise Global Medic 2011, May 18, March Air Reserve Base. 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.