Sgt. Wiljohn Santos, 40th Infantry Division, left, and Spc. Aaron Kelsey, 1072nd Transportation Company, feel the wear and tear of carrying a 30-pound pack on their backs in the grueling 10-mile ruck march of the California Army National Guard’s 2015 Best Warrior Competition at Camp San Luis Obispo, San Luis Obispo, Calif. ( Army National Guard photo/Staff Sgt. Eddie Siguenza)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
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Keywords: air, army, bureau, caarng, calguard, california, camp, challenge, competition, eddie, guard, land, luis, national, navigation, nco, ngb, obispo, obstacle, san, siguenza, slo, soldier, ssg, warrior, year