Base respond to multiple EXERCISE Active-Shooter Incident
A simulated gunman holds a hostage during an active-shooter exercise July 24, 2014, at Osan Air Base, Republic of Korea. The exercise was designed to test the base's response abilities in the event of an active-shooter emergency. (U.S. Air Force photo by Staff Sgt. Jake Barreiro)

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Photo by: Staff Sgt. Jake Barreiro |  VIRIN: 140724-F-TG070-007.JPG