51 SFS practice active shooter school scenario
Staff Sgt. Pierre Johnson, 51st Security Forces Squadron patrolman, radios for addition information on the situation during an active shooter exercise at Osan Air Base, Republic of Korea, Nov. 13, 2014. Any information provided will help responders with handling the situation better. (U.S. Air Force photo by Senior Airman Matthew Lancaster)

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Photo by: Senior Airman Matthew Lancaster |  VIRIN: 141113-F-HG907-065.JPG