Nuclear Nonproliferation Treaty; Gene Therapy; George Weidenfeld, Pt. 2

John Holum, director of the U.S. Arms Control and Disarmament Agency, and Richard Perle of the American Enterprise Institute debate the effectiveness and validity of the current Nuclear Nonproliferation Treaty. Dr. Nelson Wivel, Dr. Ron Crystal, and Chicago Tribune journalists Jeff Lyon and Peter Gorner explain the recent breakthroughs in gene therapy and its potential real-world applications. In part two of a conversation with Lord George Weidenfeld, author of "Remembering My Good Friends: An Autobiography," he describes his passion for bringing people together and his love of intellectualism.