Former chief analyst of North Vietnamese strategy for the CIA during the Vietnam War. He worked as interrogator, agent debriefer, and chief CIA strategy analyst in the Saigon embassy; subject of a landmark US Supreme Court First Amendment/national security decision; author of two non-fiction best sellers, Decent Interval and Irreparable Harm. Both of which I'veread and both I recommend.Decent Interval is about the sloppy American evacuation of Saigon/Vietnam. Irreparable Harm is about his court fight with the CIA over its publication. Freedom of speech vs national security.