Circumnavigating Lake Superior in a kayak is no easy feat, let alone solo. 20-year-old Cale Prosen might have just become the youngest and fastest to do it, completing his thousand-mile journey in just 42 days. And the triple major at the College of St. Scholastica took just one day off after final exams before hitting the water. Back home now, Cale joins us to talk about what motivated his solo trek.

And you probably saw that incredible video last week of water surging around the Rapidan Dam near Mankato. The partial failure renewed concerns about the safety of Minnesota's aging dams. Kirsti Marohn reports that a growing number of communities are switching to rock rapids and allowing rivers to flow more freely.