A wildfire believed to have been sparked by inattentive campers continues to burn, largely out of control, for its 12th day in eastern Arizona. The Wallow Fire now ranks as the state's second largest wildfire on record -- it has already left 600 square miles of pine forest blackened near the New Mexico border and driven thousands of residents from their homes. Although more than 2,000 firefighters are working to control the blaze, it still is classified as "zero percent contained" and currently threatens large power lines that supply electricity to three states. These images show some of the scenes taking place around eastern Arizona as residents and firefighters cope with the disaster.