Base respond to multiple EXERCISE Active-Shooter Incident
Staff Sgt. Joseph Kaczynski, 51st Security Forces Squadron emergency responder, surveys the scene during an active-shooter exercise July 24, 2014, at Osan Air Base, Republic of Korea. The scenario included two gunmen running through the Base Exchange. (U.S. Air Force photo by Staff Sgt. Jake Barreiro)

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Photo by: Staff Sgt. Jake Barreiro |  VIRIN: 140724-F-TG070-059.JPG