Fifty years ago on November 22, 1963, in Dallas's Dealey Plaza, John Fitzgerald Kennedy, the 35th President of the United States, was assassinated while traveling in a motorcade with his wife, Jacqueline. LIFE magazine, the weekly pictorial chronicle of events in America and throughout the world, was quickly on the scene. The Kennedys had been our story: Jack and Jackie made the cover in his sailboat before they were married and he was a fresh-faced...