Master Sgt. Jaqueline Billups, 28th Medical Operations Squadron clinical medicine flight chief, monitors the heart rate of Staff Sgt. Kathleen Couillard, 28th MDOS bioenvironmental technician, during an Integrated Base Emergency Response Capabilities Training at Ellsworth Air Force Base, S.D., May 22, 2014. The week-long exercise provided Airmen with training opportunities related to honing chemical, biological, radiological and nuclear defense skills. (U.S. Air Force photo by Senior Airman Anania Tekurio/Released)