This photo released by the U.S. Fish and Wildlife Service shows the Pine Creek North wildfire at Seney National Wildlife Refuge in Seney, Mich. Wednesday, May 23, 2012. The wildfire in Michigan's Upper Peninsula has burned at least 1,500 acres of a wildlife refuge, leading to the expected closing of some trails and roads through the Memorial Day weekend. (AP Photo/U.S. Fish and Wildlife Service)