Tech. Sgt. Carl Kremer, 434th Air Refueling Wing combat readiness specialist, performs a radio check with exercise evaluation team members prior to an active-shooter exercise held here July 13, 2013. The scenario tested the base's security, command and control, and fire department members as well as individual offices and organizations ability to follow the plans and checklists in place. (U.S. Air Force photo/Tech. Sgt. Douglas Hays)
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