Airmen from the 28th Civil Engineer Squadron Explosive Ordinance Disposal team, don mission-oriented protective posture gear during a Chemical, Biological, Radiological, Nuclear and Explosive training exercise at Ellsworth Air Force Base, S.D., Nov. 6, 2013. During the exercise, crews were tested on their ability to safely respond to a suspicious object report in the base Post Office. (U.S. Air Force photo by Senior Airman Zachary Hada/Released)