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Paul Salopek and his guide walk into the desert, on day 19 of the "Out of Eden walk" in the Afar region of Northeast Ethiopia. The walk with take about 7 years total. Paul Salopek/National Geographic hide caption

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Paul Salopek/National Geographic
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Wednesday

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Men walk amid rubble after Boko Haram militants raided the town of Benisheik in northeast Nigeria, on Sept. 19. The Islamist group has been waging an insurgency in northern and central Nigeria for the past four years and was recently placed on the U.S. list of terrorist groups. Reuters/Landov hide caption

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Reuters/Landov
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