1963 - South Vietnamese President Ngo Dihn Diem is assassinated following a military coup.
1966 - The Cuban Adjustment Act enters force, allowing 123,000 Cubans the opportunity to apply for permanent residence in the United States.
1967 - Vietnam War: US President Lyndon B. Johnson holds a secret meeting with a group of the nation's most prestigious leaders ("the Wise Men") and asks them to suggest ways to unite the American people behind the war effort. They conclude that the American people should be given more optimistic reports on the progress of the war.