Enter to win every day in CTNOW's 21 Days of Summer Giveaways. Click here to see today's prize.

Robert S. McNamara

From front, McNamara, President Lyndon Johnson, and Secretary of State Dean Rusk listen to a briefing on the Vietnam War in September 1964. McNamara later questioned "domino theory" fears that a loss in South Vietnam would have led to a succession of Communist takeovers elsewhere in Southeast Asia. AFP/Getty Images
Loading

92°