As his father nears death in his retirement home in Mexico, John H. Richardson begins to unravel a life filled with drama and secrecy. John Sr. was a CIA "chief of station" on some of the hottest assignments of the Cold War, from the back alleys of occupied Vienna to the jungles of the Philippines--and especially Saigon, where he became a pivotal player in the turning point of the Vietnam War: the overthrow of South Vietnamese president Ngo Dinh...