Replay: How Isolated Tribes Fight Back

Scott Wallace talks about his trip to Brazil reporting on the efforts of the Guajajara people to protect uncontacted tribes from loggers, miners, and poachers. Wallace is a professor of journalism at the University of Connecticut, a contributor to National Geographic, and a former reporter for CBS and CNN. He's the author of The Unconquered: In Search of the Amazon’s Last Uncontacted Tribes.