He is 80 years old, his hair and wispy goatee are snow whitẹ But his eyes are still sharp, alert, inquisitive, and his manner is feistỵ Gen. Nguyen Khanh was the man who overthrew the government of Gen. Duong “Big Minh” Van Minh in a coup on Jan. 20, 1964 in Saigon. The coup took place shortly after South Vietnamese President Ngo Dinh Diem was murdered. Saigon gained the reputation back then as the “double cross capital of the world.” Khanh, who some critics labeled ruthless, shrewd, and unreliable, was head of state of South Vietnam until Feb. 25, 1965...