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
September 11 attacks
September 11 attacks
John F. Kennedy