U.S. Air Force Senior Airman Corey Evans, medical service journeyman, from the 81st Medical Group, Keesler, Miss., helps set up a Utilis TM60 Tall Staking tent during a field exercise at the Joint Readiness Training Center (JRTC), Fort Polk, La., March 15, 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)