Name of the President (and anyone else injured): Adlai Stevenson
Assassin(s): Lee Harvey Oswald
Method of Assassination: Car Bomb
Place Assassinated: Dallas
The Date: November 22, 1963
Any Details: Stevenson's embargo on Cuba angered Oswald. This coupled with his war on the mafia led to Oswald and mob bosses teaming up, yaddah, JFK become President. JFK keeps Americans out of Vietnam.