Environmental journalist Tara Lohan speaks about her new book, "Undammed: Freeing Rivers and Bringing Communities to Life." Lohan has spent years writing about various environmental issues. She has become particularly interested in dam removal and what that means for the environment and the people who rely on those rivers. (00:20) Then, world-renowned wildlife biologist Diane Boyd has spent our decades studying and advocating for wolves in the wilds of Montana near Glacier National Park.