Defenders load their magazines in preparation for the combat arms component of the Air Force Defender’s Challenge 2018 at Camp Bullis in San Antonio, Texas, Sept. 11, 2018. To be a lethal force defenders must be able to accurately fire various weapons.

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Photo credit: © Bob Collet / Alamy / Afripics
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Keywords: 2018, air, america, archive, armed, army, challenge, competition, defence, defenders, force, forces, guard, guardsmen, military, national, navy, reportage, security, service, serviceman, servicemen, soldier, states, united, usa