U.S. Air Force Staff Sgt. Bethani Joseph, 633rd Security Forces Squadron patrolman, is followed by Staff Sgt. Ervin Faison, 633rd SFS member, during a simulated-active shooter exercise at Langley Air Force Base, Va., Nov. 15, 2012. Joseph and Faison were part of the first responder team for security forces. (U.S. Air Force photo by Airman Kimberly Nagle/Released)