A 99th Civil Engineer Squadron Fire Protection Flight Airman passes out triage tags to label the severity of simulated injuries during a base exercise at Nellis Air Force Base, Nev., May 12, 2016. Each scenario had simulated active shooters and included volunteers who underwent moulage to simulate injuries that would occur during such an attack. (U.S. Air Force photo by Airman 1st Class Kevin Tanenbaum)