U.S. Army Sgt. Alex Page, 82nd Civil Support Team survey team member, adjusts his gas mask before participating in a training exercise at Ellsworth Air Force Base, S.D., Jan. 8, 2014. The 82nd CST’s mission is to strengthen local and regional terrorism response capabilities during events known or suspected to involve weapons of mass destruction. (U.S. Air Force photo by Senior Airman Zachary Hada/Released)