Zeev,
I have a friend who has a former co-worker still working on wall street who, soon after 9/11, discovered and analyzed the put volume on United and American stock. He knew there was something fishy and called the FBI, the CIA and the SEC, and then the newspapers. He was interviewed and to my friend's recollection there was at least one article about this in the Wall street journal. The 9-11 commission needs to acknowledge this happened and include a discussion of the subsequent investigation in their report, even if it has led to a dead end for good reason. (after all, maybe some high roller speculators simply got lucky. However, I am more cynical and suspect that this is a clue to be followed.)
The 9-11 commission website (www.9-11commission.gov) has an email address for contacting the commission. I for one sent a request that these matters be included in the report. It will be if enough people speak up. I hope anyone reading this takes the time to send an email.
5cap