One year ago, two women fulfilled a childhood dream by skiing across Antarctica. Last February, two women--Ann Bancroft of the United States and Liv Arnesen of Norway--traveled 2,762 kilometers in 94 days across the frozen continent. Early this year, they returned to Antarctica to announce their new expedition. In May, Ann Bancroft and Liv Arnesen plan to row canoes, kayaks, and ore boats across North America's St. Lawrence River, and four of America's five Great Lakes--Lake Superior, Lake Huron, Lake Erie and Lake Ontario. The journey will last seven weeks and cover 2,880 kilometers. They tell VOA's Tom Crosby all about it in this edition of Dateline.