A U.S. Air Force C-130H Hercules aircraft loadmaster, center, with the Nevada Air National Guard gives a preflight safety briefing to simulated civilian evacuees at the Geronimo landing zone during Joint Readiness Training Center (JRTC) 14-05 training at Fort Polk, La., March 14, 2014. The JRTC provides U.S. military units and personnel with realistic pre-deployment training scenarios in all aspects of armed conflict.