This April 13, 2014 view shows Hoover Dam, a concrete arch-gravity dam in the Black Canyon of the Colorado River on the border between the US states of Arizona and Nevada. Hoover Dam ,finished in 1936, impounds Lake Mead, the largest reservoir in the United States by volume. The dam's generators provide power for public and private utilities in Nevada, Arizona, and California. Hoover Dam is a major tourist attraction; nearly a million people tour the dam each year. AFP PHOTO/JOE KLAMAR / AFP PHOTO / JOE KLAMAR (Photo credit should read JOE KLAMAR/AFP/Getty Images)
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AFP JOE KLAMAR