Air Force Master Sergeant Daniel Chrisco, an active shooter exercise player pretends to be a co-worker as he knocks on office doors in the 773d Civil Engineer Squadron in an attempt to get someone to open their door during an exercise March 13. The Security Forces Squadron on Joint Base Elmendorf-Richardson conducts regular no-notice tests of offices’ active shooter mentalities around base. ( Air Force photo by Senior Airman Kyle Johnson)

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Size: 7360px × 4912px
Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: active, shooter