Training weapons sit on display while being assigned to trainees during an active shooter training session hosted by the Federal Bureau of Investigation May 21, 2014, at The Locker House, Keesler Air Force Base, Miss. The two-day Advanced Law Enforcement Rapid Response Training focused on terrorism response tactics, which is designed to prepare the first responder to isolate, distract, and neutralize an "active shooter." (U.S. Air Force photo by Kemberly Groue)