A tenacious problem is affecting Vermont's waterways: invasive species. Eurasian milfoil, zebra mussels and water chestnuts, to name a few, can be found in various lakes around the state. We look at where aquatic invasives come from, how they spread and what scientists are doing to get ahead of the problem.
Reporter Candace Page looks at the state's effort to clean up Lake Champlain and whether the appointment of a "lake czar" will make the difference.
We take a trip across the southern end of Lake Champlain on a ferry that's been in operation since the late 1700's.