LAKE MEAD NRA, NV - OCTOBER 26: An aerial view shows the Mike O'Callaghan-Pat Tillman Memorial Bridge part of the Hoover Dam Bypass Project in front of the Hoover Dam October 26, 2010 in the Lake Mead National Recreation Area, Nevada. The 1,900-foot-long structure sits 890 feet above the Colorado River, about a quarter of a mile downstream from the Hoover Dam. The USD 240 million four-lane bypass project to relieve vehicle traffic on the Hoover Dam began in 2003, and opened to traffic on October 19. (Photo by Ethan Miller/Getty Images)
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