U.S. Air Force Master Sgt. Matthew Bridge, 18th Security Forces Squadron Alpha Flight chief, directs exercise participants to evacuate the building during an active shooter training exercise June 25, 2018, at Ryukyu Middle School, Kadena Air Base, Japan. The exercise enabled 18th SFS defenders to work with a U.S. Marine Corps special reaction team and the Kadena Fire Department to hone their skills. (U.S. Air Force photo by Staff Sgt. Micaiah Anthony)