U.S. Air Force military personnel prepare to set up an Alaskan tent during a field exercise at the Joint Readiness Training Center (JRTC), Fort Polk, La., March 14, 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)