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Clinton J. Hill (born January 4, 1932) is a former U.S. Secret Service agent who served under five United States presidents, from Dwight D. Eisenhower to Gerald Ford. Hill is best known for his act of bravery while in the presidential motorcade on November 22, 1963, when President John F. Kennedy was assassinated in Dallas, Texas.During the assassination, Hill ran from the Secret Service followup car, behind the presidential limousine, leaped onto the back of it and shielded Jacqueline Kennedy and the stricken president with his body as the car raced to Parkland Memorial Hospital. His act is documented in film footage by Abraham Zapruder. Since the death of Nellie Connally in September 2006, Hill is the last surviving person who was in the presidential limousine that day.