U.S. Air Force Senior Airman Corey Evans, left, a medical service journeyman, and 1st Lt. Elizabeth Harrell, a clinical nurse, both with the 81st Medical Group, put up a tent at Fort Polk, La., March 14, 2014, during Joint Readiness Training Center (JRTC) 14-05 training. The JRTC provides U.S. military units and personnel with realistic pre-deployment training scenarios in all aspects of armed conflict.