Factual errors

The narration states that school in Dallas had been let out for the day to enable children to see the President's motorcade. This did not happen, as the school district was debating what to do with early release after the assassination and finally determined that the school buses would run at the regular times that afternoon.

Revealing mistakes

The shots of "Air Force One" returning to Washington actually shows one of the backup aircraft, as evidenced by the lack of the Presidential seal on the nose of the aircraft.