Ben Goldfarb & Heidi Perryman: Beaver Believers

Ben Goldfarb, environmental journalist and author of "Eager: The Surprising, Secret Life of Beavers and Why They Matter," talks about the essential role that beavers play in maintaining a healthy environment. Heidi Perryman, founder of "Worth a Dam," shares the story of a community coming together to save beavers in Martinez, California.