Air Force Staff Sgt. Mark Melchiori, 435th Security Forces Squadron contingency response fire-team leader, hoists a rucksack over his head after stepping off a bus for exercise Frozen Defender in Grostenquin, France, Jan. 14, 2020. Frozen Defender tests the squadron’s capabilities in a contested environment under harsh conditions. The 435th SFS Defenders must be physically prepared to carry more than 70 lbs of equipment into these environments. ( Air Force photo by Staff Sgt. Devin Boyer)

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Photo credit: © Operation 2021 / Alamy / Afripics
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