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DENVER - DECEMBER 20: De-Icing crews try to get a Continental Airlines plane clear of snow and ice at Denver International Airport December 20, 2006 in Denver, Colorado. Heavy snow came in early Wednesday December 20 and shut down the airport stranding passengers overnight and closed highways out of Colorado in all directions, Governor Bill Owens (R-CO) has declared a state of emergency. (Photo by Thomas Cooper/Getty Images)
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