Airman 1st Class Ronald Reynolds, 28th Civil Engineer Squadron emergency management technician, and Staff Sgt. Kathleen Couillard, 28th Medical Operations Squadron bioenvironmental technician, test air quality during a simulated radiation scenario as part of an Integrated Base Emergency Response Capabilities Training at Ellsworth Air Force Base, S.D., May 22, 2014. The test determines the type of respiratory protection emergency response teams need in order to safely operate in a compromised environment. (U.S. Air Force photo by Senior Airman Anania Tekurio/Released)