Army Sgt. Luis Cruz, assigned to the 688th Rapid Port Opening Element, enters a contaminated area wearing a gas mask during a chemical, biological, radiological and nuclear scenario as part of the 2017 Army Materiel Command's Best Warrior Competition July 17, 2017, at Camp Atterbury, Indiana. During the three-day competition, these elite warriors are test on basic and advanced warrior tasks and drills.

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Photo credit: © Bob Collet / Alamy / Afripics
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Keywords: -commissioned, air, america, archive, armed, army, command, competition, defence, force, forces, materiel, military, navy, nco, officer, reportage, ruckmarch, service, serviceman, servicemen, soldier, soldiers, states, united, usa, warrior