Tire tracks cross an area that was once underwater at the Boulder Harbor boat ramp in the Lake Mead National Recreation Area, Monday, May 18, 2015, near Boulder City, Nev. (AP Photo/John Locher)
Tire tracks cross an area that was once underwater at the Boulder Harbor boat ramp in the Lake Mead National Recreation Area, Monday, May 18, 2015, near Boulder City, Nev. (AP Photo/John Locher)
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