Northern Minnesotans know how to thrive in winter. Ice fishing, snowmobiling, ice skating, snow-shoeing, cross country skiing, curling and sitting in saunas are just a few ways we blow through the winter blahs. Dan Carlson's hobby blows most people's out of the water. In fact, Dan Carlson loves being under the water. He loves scuba diving. During the frigid winter months, he scuba dives the frozen lakes of northern Minnesota. In this segment of Area Voices, Dan Carlson talks ice diving.