nonsense - they have lost other films and documents - and if you answer, well, this was something that was much more graphic and valuable, well, virtually no one knew it at the time and no one could have, in the aftermath, proved it. It would have been simply forgotten. The logic of the alterationist position is beyond bizarre - given a choice between altering something that STILL convinced everyone of a conspiracy, and destroying the evidence, they would have destroyed the evidence. What a lot of alterationists don't really get is how different the world was in 1963. A lost film would simply have faded from evidence - think about something - the actual film didn't surface publicly for about 10 years, so it was essentially lost - and NO ONE complained or noticed in that time, in any way that effected public opinion. I challenge you to cite one source - ANY SOURCE - who cited the Zapruder in the period between the assassination and the reveal on Geraldo, or who said it was incriminating or urgent to release it. Really - find me one citation, one quote that really had an impact on public opinion. There is not one, because public opinion isn't effected until the film - supposedly altered - is shown on national television. Which completely proves that if the Zapruder film had disappeared no one would have made that much of its absence.
It is fine if you can prove me wrong, but you have to come up with evidence.