U.S. Air Force Tech. Sgt. Michael Flores, right, 18th Security Forces Squadron assistant Alpha Flight chief, and Master Sgt. Matthew Bridge, 18th SFS Alpha Flight chief, confront a simulated active shooter during a training exercise June 25, 2018, at Ryukyu Middle School, Kadena Air Base, Japan. The training enabled defenders to test new equipment, practice communication and coordination techniques. (U.S. Air Force photo by Staff Sgt. Micaiah Anthony)