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In this aerial photo, vehicles in a lot are submerged in flood waters Monday, Sept. 16, 2013, in Greeley, Colo. Rescuers grounded by weekend rains took advantage of the break in the weather to resume searches for people still stranded, with 21 helicopters fanning out over the mountainsides and the plains to drop supplies and airlift those who need help. (AP Photo/The Coloradoan, Dawn Madura)
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