President Kennedy's limousine speeds along Elm Street toward the Stemmons …

Photo by Associated Press | published: November 20, 2013

President Kennedy's limousine speeds along Elm Street toward the Stemmons Freeway overpass moments after he was shot at Dealey Plaza in Dallas, Tex., Nov. 22, 1963. Secret Service agent Clint Hill is seen on the back of the car as Jacqueline Kennedy tends to her fatally wounded husband.