Maj. John Wesley Powell, buried in Arlington National Cemetery’s Section 1, Grave 408, was the first person to explore the Grand Canyon in 1868. Powell was also a geologist and Native-American linguist. ( Army photo by Rachel Larue/released)

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Size: 1935px × 1291px
Photo credit: © PJF Military Collection / Alamy / Afripics
License: Licensed
Model Released: No

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