The response force tactical course cadre give a demonstration, to Air Force Global Strike Command defenders during a response force tactical course, on how to properly infiltrate a building during an active shooter scenario Mar. 27, 2019, at the 90th Ground Combat Training Squadron, Camp Guernsey, Wyo. During the training, the Airmen went over various tactics on entering and clearing a room, brushed up on M4 and M9 shooting and went through simulated night time situations with night vision goggles. (U.S. Air Force photo by Senior Airman Abbigayle Williams)