U.S. Army Sgt. Alex Page, 82nd Civil Support Team survey team member, collects samples of a simulated unknown substance during a training exercise at Ellsworth Air Force Base, S.D., Jan. 23, 2014. The exercise was designed to test the ability of 82 CST members to respond and collect unknown substances that may pose a threat to lives. (U.S. Air Force photo by Senior Airman Zachary Hada/Released)