Defenders with the 307th Security Forces Squadron use simulated weapons while running through various scenarios before transitioning to real weapons during an active shooter exercise at Barksdale Air Force Base, La., May 30, 2017. The two-day annual training helps prepare the defenders to react during real-world situations. ( Air Force photo by Staff Sgt. Jason McCasland)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: #307thbombwing, #307thsfsdefenders, #activeshootertraining, #simulatedrounds