Did JFK's limousine come to a stop amid the gunfire?

Watch this video, especially at the 1:19 mark. It is one reason why I no longer dismiss the idea that Abraham Zapruder's film of JFK's assassination was altered.

Thanks to Doug Horne's interview with Dino Brugioni, the CIA's leading photo analyst, I have had to revisit my previous skepticism. Brugioni viewed the Zapruder film not long after it was delive…