Capt. Andrew Callanan, a Army Reserve military police officer with the 535th Military Police Battalion, of Cary, North Carolina, poses for a portrait during the Active Shooter Threat Response Training taught at an Army Reserve installation in Nashville, Tennessee, on Sept. 29. This image was digitally manipulated in post-production. ( Army Reserve photo by Master Sgt. Michel Sauret)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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