A wildfire in a northeast Minnesota woodland grew by nearly tenfold Tuesday, giving off a pall of smoke that stretched from the Canadian border to southern Wisconsin. Minnesota Gov. Mark Dayton called in National Guard helicopters to assist firefighters as the Pagami Creek fire, located in the remote Superior National Forest. It spread from about 11,000 acres on Monday to more than 100,000 by Tuesday afternoon, said Doug Anderson, a spokesman for the firefighting effort.