LAS VEGAS, NV - DECEMBER 14: The High Roller, the world's largest Ferris wheel, is under construction just to the east of Harrah's and The Flamingo Hotels on December 14, 2013 in Las Vegas, Nevada. Tourism in America's "Sin City" is slowly making a comeback from the Great Recession with visitors filling the hotels, restaurants, and casinos in record numbers. (Photo by George Rose/Getty Images)
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