A U.S. Air Force Airman from the 633rd Medical Group tends to simulated wounds on a role-player’s leg during an active shooter exercise at Langley Air Force Base, Virginia, March 27, 2019. The purpose of the exercise was to execute plans, checklists, standard operating procedures and agreements with local external organizations in the event of an active shooter. (U.S. Air Force photo by Senior Airman Anthony Nin Leclerec)