U.S. Air Force Airman 1st Class Ashia Montalvo, 633rd Medical Group surgical technician, puts moulage on Airman 1st Class Corey Watkins, 633rd Civil Engineer Squadron firefighter, before an active-shooter exercise at Langley Air Force Base, Va., Nov. 19, 2013. Montalvo and four other Airmen acted as victims during the exercise to test emergency responders’ ability to treat injuries. (U.S. Air Force photo by Airman 1st Class Victoria H. Taylor/Released)