Cpl. Merrick Killpatrick, rifleman with Special Purpose Marine Air-Ground Task Force Crisis Response-Africa, hikes up Mt. Etna, an active volcano in Sicily, for the Marine Corps Martial Arts Instructor course graduation, July 21, 2016. The four-week long MAI course included intense hand-to-hand combat, physical training, and classes on additional techniques and warrior ethos. ( Marine Corps photo by Cpl. Alexander Mitchell/released)

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