I remember someone saying that there was a last minute change in the motorcade route. That originally they weren't supposed to go by the bookstore. The supposition there was that Oswald could not possibly have known of the change in the route days before when he was picking his shot-spot and therefore set himself up in the wrong position if he was going to kill Kennedy. Had either of you ever heard/read that one. I suppose the route had to be common knowledge just before the motorcade came through that day or else there wouldn't have been so many people lining the street there.