Mn Sea Grant: Superior Waves

Seagulls and sightseers crowd Canal Park in Duluth, taking in some of the treasures of Duluth's maritime industry. Among them, a group of 15 teachers file into the Lake Superior Maritime Visitor Center to learn about the importance of shipping on the Great Lakes. It's part of a five-day course put on by Joan Chadde — coordinator of the Great Lakes Maritime Transportation Teacher Institute.