Third and fourth terms of the presidency of Franklin D. Roosevelt
On the morning of December 7, 1941, the Japanese struck the U.S. naval base at Pearl Harbor with a surprise attack, knocking out the main American battleship fleet and killing 2,403 American servicemen and civilians. The great majority of scholars have rejected the conspiracy thesis that Roosevelt, or any other high government officials, knew in advance about the Japanese attack on Pearl Harbor. The Japanese had kept their secrets closely guarded, and while senior American officials were aware that war was imminent, they did not expect an attack on Pearl Harbor. Roosevelt had anticipated that the first attack would take place in the Dutch East Indies, Thailand, or the Philippines.
John F. Kennedy
The assassination had an effect on many people, not only in the U.S. but around the world. Many vividly remember where they were when they first learned the news that Kennedy was assassinated, as with the Japanese attack on Pearl Harbor on December 7, 1941, before it and the September 11 attacks after it. UN Ambassador Adlai Stevenson said of the assassination: "all of us. ... . will bear the grief of his death until the day of ours." Many people have also spoken of the shocking news, compounded by the pall of uncertainty about the identity of the assassin(s), the possible instigators, and the causes of the killing, as an end to innocence, and in retrospect it has been coalesced with other changes of the tumultuous decade of the 1960s, especially the Vietnam War.