* Story Highlights * Robert McNamara was key architect of war in Vietnam under two presidents * McNamara became lightning rod for his management of that war * He was member of President Kennedy’s inner circle during Cuban Missile Crisis(CNN) — Former U.S. Defense Secretary Robert McNamara, a key architect of the U.S. war in Vietnam under presidents John F. Kennedy and Lyndon Johnson, has died at age 93, according to his family.McNamara was a member of Kennedy’s inner circle during the Cuban Miss