Robert talks with Stanley Karnow, the author of "Vietnam: A History." Karnow was the chief correspondent in the PBS series "Vietnam: A Television History" and was present in Vietnam in 1959, when the first Americans were killed in the region. He covered the war until it ended. Karnow talks about the Tet Offensive during the Vietnam War. It was on this day in 1968 that the Viet Cong launched an attack on South Vietnam, on the Vietnamese Tet holiday. Though the U-S and South Vietnamese forces suffered far fewer casualties than the North Vietnamese, the fact that the attack occurred at all...as American advisors and military analysts had claimed that the resources for such a well-orchestrated attack no longer existed...deeply disillusioned the American public and the war never again enjoyed wide support in the U-S.