U.S. Air Force Staff Sgt. Krystal Walker, medical material craftsman, 375th Aeromedical Evacuation Squadron, Scott Air Force Base, Ill., briefs aeromedical personnel at Joint Readiness Training Center, Intermediate Staging Base, Alexandria, La., Jan. 15, 2014. Service members at JRTC 14-03 are educated in combat patient care and aeromedical evacuation in a simulated combat environment. (U.S. Air Force photo by Master Sgt. John R. Nimmo, Sr./Released)