U.S. Air Force Senior Master Sgt. Mark De Corte, aeromedical evacuation technician, from the 75th Medical Operations Squadron, Hill Air Force Base, Utah, instructs airmen how to pack a rucksack during a field exercise at the Joint Readiness Training Center (JRTC), Alexandria, La., March 11, 2014. Service members at JRTC 14-05 are educated in combat patient care and aeromedical evacuation in a simulated combat environment. (U.S. Air Force photo by Staff Sgt Joseph Araiza/Released)