Tech. Sgt. Timothy Bricker, 28th Civil Engineer Squadron emergency management NCO in charge, briefs Airmen on the situation they are facing during an Integrated Base Emergency Response Capabilities Training at Ellsworth Air Force Base, S.D., May 22, 2014. Two teams of Airmen participated in simulated radiation scenarios requiring them to test air levels for radiation and establish safety zones. (U.S. Air Force photo by Senior Airman Anania Tekurio/Released)