At 29,029 ft. above sea level, Mount Everest — also called Mount Chomolungma — is the highest mountain on Earth. Bartosz Hadyniak/iStockphoto.com hide caption

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American abolitionist John Brown led the 1859 raid on Harpers Ferry, Va. That takeover and the man behind it are the subjects of historian Tony Horwitz's new book, Midnight Rising. Hulton Archive/Getty Images hide caption

itoggle caption Hulton Archive/Getty Images