In this aerial photo, an area of the Pagami Creek wildfire shows active burning and creates a large smoke plume on Tuesday Sept. 13, 2011 in the Boundary Waters Canoe Area Wilderness in Northeastern Minnesota. The haze from the fire was heavy enough that some people reported burning eyes and difficulty breathing in the Chicago area, 600 miles south of the forest fire, the National Weather Service said. (AP Photo/The Duluth News-Tribune, Clint Austin)