A recently discovered home movie showing President John F. Kennedy's motorcade shortly before his assassination was unveiled Monday on the Web site of a Dallas museum. The silent, 8 mm color film is "the clearest, best film of Jackie in the motorcade," said Gary Mack, curator of the Sixth Floor Museum, which focuses on Kennedy's life and assassination. The film shows a brief but clear glimpse of President Kennedy and his wife, Jacqueline, a few blocks from Dealey Plaza and roughly 90 seconds before the killing. Also visible is Secret Service agent Clint Hill riding on the back of the car. After the shots were fired, Hill jumped onto the car as it drove to the hospital. The film ends with some footage the next day outside the Texas School Book Depository, the building from which assassin Lee Harvey Oswald fired the fatal shots. The museum is located on the floor where Oswald set up his sniper's perch.