Police Col. Chris Owens discusses active shooter response methods with Reserve Citizen Airmen of the 413th Aeromedical Staging Squadron June 2, 2018, at Robins Air Force Base, Georgia. Owens is a director of training with the Lee County, Georgia, Sheriff's Office and visited the military unit to provide strategies and guidance on surviving an active shooter event. (U.S. Air Force photo by Jamal D. Sutter)