Spc. Fabio Avetisyan, left, coughs and gasps for air Nov. 8 after exiting a gas chamber during the California Army National Guard's 2017-18 Best Warrior Competition at Camp San Luis Obispo, California. This was one of the last tests after four competitive days to find California’s Best of the Best. (Army National Guard photo by Staff Sgt. Eddie Siguenza)

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