in the early part of the movie, John Wilkes Booth, is seen entering the presidential box, I saw two mistakes in one, first mistake was the lock on the door was of a type not invented until about 80 years after Lincoln's assassination, and the 2nd mistake was if the lock could have existed in 1865, it was installed on the door the wrong way, pushing the button on the lock, would have locked the President inside of the box, not kept someone out.