McNamara Gulf of Tonkin 1964

Secretary of Defense Robert S. McNamara, in a post-midnight press briefing in the Pentagon, points out action in Gulf of Tonkin attacks by North Vietnam PT boats against U.S. destroyers on patrol, August 4, 1964. McNamara called the attacks unprovoked and deliberate, in view of the previous attack on Aug. 2. (AP Photo/Bob Schutz)

Defense Secretary Robert McNamara briefs the press on a purported attack on U.S. destroyers in the Gulf of Tonkin on Aug. 4, 1964, following an Aug. 2 attack. The consequence was a congressional resolution that led to war. (AP Photo/Bob Schutz)

AP Photo/Bob Schutz