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Wildfires threaten Yosemite

A Smokey the Bear sigb is posted along US highway 120 as the Rim Fire burns out of control on August 21, 2013 in Groveland, California. The Rim Fire continues to burn out of control and threatens 2,500 homes outside of Yosemite National Park. Over 400 firefighters are battling the blaze that is only 5 percent contained. (Photo by Justin Sullivan/Getty Images)

Wildfires threaten California's Yosemite park

One of the largest California wildfires in decades roared largely

unchecked for a 10th day.