Hi Bill,
I guess I'm a little wet behind the ears here, compared to some of the other members of this site. I've been hanging around for quite a while, but I've read too many ridiculous posts about film alteration, and felt the need to respond in some way, even if my only form of defence is sarcasm. If common sense prevailed, I'd come up with something a little more sensible. There are a number of coherent and intelligent people that contribute to this site - you included, of course - but I believe there's a majority that serves just to obfuscate the truth, whatever that may be.
For the record, I think Oswald did it alone. This is only because, in all the books I've read and documentaries I've watched about the assassination, I've yet to come across a convincing argument to suggest an alternative. I don't mind telling you that, because don't think you'll be offended. I can be persuaded otherwise - because I enjoy a healthy and enlightening debate, and I never mind admitting I'm wrong.
Paul.