Airmen assigned to the 60th Security Forces Squadron move toward the sound of gunfire during an active shooter training event April 13, 2016, at Travis Air Force Base, California. ( Air Force photo by Staff Sgt. Charles Rivezzo)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
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Keywords: afb, air, airmen, base, enforcement, force, forces, law, m4, military, police, security, training, travis