During a live television broadcast, businessman Jack Ruby shot and fatally wounded Lee Harvey Oswald, who assassinated U.S. president John F. Kennedy, fueling numerous conspiracy theories.

Jack Leon Ruby was an American nightclub owner who murdered Lee Harvey Oswald on November 24, 1963, two days after Oswald assassinated President John F. Kennedy.

Lee Harvey Oswald was a U.S. Marine veteran who assassinated John F. Kennedy, the 35th president of the United States, on November 22, 1963.

John F. Kennedy, the 35th president of the United States, was assassinated while riding in a presidential motorcade through Dealey Plaza in Dallas, Texas, on November 22, 1963. Kennedy was in the vehicle with his wife Jacqueline, Texas governor John Connally, and Connally's wife Nellie, when he was fatally shot from the nearby Texas School Book Depository by Lee Harvey Oswald, a former U.S. Marine. The motorcade rushed to Parkland Memorial Hospital, where Kennedy was pronounced dead about 30 minutes after the shooting; Connally was also wounded in the attack but recovered. Vice president Lyndon B. Johnson was hastily sworn in as president two hours and eight minutes later aboard Air Force One at Dallas Love Field.

The assassination of John F. Kennedy, the 35th president of the United States, on November 22, 1963, has spawned numerous conspiracy theories. These theories allege the involvement of the Central Intelligence Agency (CIA), the Mafia, Vice President Lyndon B. Johnson, Cuban Prime Minister Fidel Castro, the KGB, or some combination of these individuals and entities.