There are certain people who continually demand PROOF of things who, no matter what evidence you present, will ALWAYS give you a reason why it will not suffice.
For example, you could show them a videotape of the actual event and they would tell you that it proves nothing because you cannot PROVE that it was not fabricated doctored etc etc. Similarly, you could show them laboratory spectrometer analysis of metal taken from the wreckage and they would argue that the results PROVE NOTHING because they could have been contaminated etc etc.
It is best to avoid the temptation to engage these posters in debate as they are likely paid to post these messages and will NEVER be satisfied.
I would love to see a video of the actual event. Obviously, none exists. Amazingly, folks like you seem willing to believe such a video exists despite there being no evidence of it. And what exactly IS proven by a laboratory spectrometer analysis that draws no specific conclusions?
Your final assertion that people who dare to question poorly supported theories are paid to post those questions indicates you live in a world of paranoia worthy of medical study. Do you really think the government gives a damn about crackpot theories posted on FreeRepublic. 95% of the people who read FreeRepublic don't even give a damn about the crackpot theories posted here.