New York Times television critic Peter Boyer. His new book, Who Killed CBS? The Undoing of America's Number One News Network, explores the recent turmoil within the news division of CBS, and how it has effected the entire corporation. He reports on the ill-fated reign of CBS News President Van Gordon Sauter, the tenure of Dan Rather as anchor of the CBS Evening News and the takeover of CBS by New York investor Laurence Tisch.