U.S. Air Force Airman 1st Class Dumal Bruce, 27th Intelligence Support Squadron help desk technician, lies on the ground awaiting further instructions from Security Forces at Langley Air Force Base, Va., Nov. 15, 2012. Bruce was a participant in an active shooter exercise, testing the abilities of first responders during extreme scenarios. (U.S. Air Force photo by Airman Kimberly Nagle/Released)