An arctic blast of snow, sleet and ice is sweeping across the U.S. South.<br/> <br />Freezing temperatures -- worsened by dangerous wind chills -- are prompting warnings and advisories for much of the east coast.<br/> <br />States as far south as Lousiania and Georgia are seeing snow.<br/> <br />In airports, more than 2,800 U.S. flights have been canceled and hundreds delayed.<br/> <br />Farther north....the winter in Wisconsin has transformed the rocky coastline along the Lake Superior shores into a wonderland of ice caves.
