A slurry bomber works against the wildfire near Boulder, Colo., on Tuesday, Sept. 7, 2010. Colorado Gov. Bill Ritter has declared a state of emergency as officials nearly doubled the fire's estimated size to more than 7,100 acres, or 11 square miles. At one point, the plume from the fire could be seen in Wyoming, 90 miles to the north. (AP Photo/Daily Camera, Paul Aiken)