T. Boone Pickens made his fortune in the oil business, but the 83-year-old recently shifted his focus to America’s energy future, and how to reduce U.S. dependence on foreign oil. During this week’s TED Full Spectrum Conference, Pickens is speaking about the future of energy. In the second part of his interview, Pickens discusses natural gas and the controversial practice of fracking with fellow presenter John Hockenberry.