51st SFS defenders conduct active-shooter training
Master Sgt. Andrew Farris, 51st Security Forces Squadron defender, plays an active-shooter during an internal exercise on Osan Air Base, Republic of Korea, Dec. 10, 2015. The active shooter exercises and training allows both the defenders and the squadrons associated to train in the event of a real-world incident. (U.S. Air Force photo/Senior Airman Kristin High)