I really don't understand the aggression from many posters here. If people read too much on the subject, they're accused of having no lives. If they don't read enough, they're accused of being ignorant.
I've not even put forward a conspiracy theory other than that there are some facts which really don't ring true in the official story and indicators that the government DID behave badly in some areas (e.g. the Bin Ladens shipping out.)
It's important to continuously question those in authority. It really is. Corporations have to be forced to assume corporate responsibility because it's been shown over and over that they won't do it for themselves (except to avoid poor PR). The American political and legal systems are almost entirely corporate in culture. Cover ups happen. Look at all the historical scandals that only came to light years later. What do you think all these three letter agencies do all the time?
It's also very important to question sources on both sides - 'official' releases and the releases put out by interested parties. You may disagree with them, but I really don't think you can casually disregard the A&E group. I have no clue about engineering but I know that they do. They're all professionals, some of whom are extremely experienced and educated. They are also more independent than any government funded investigation.
And for those who say it's disrespectful, well often it is those who are most damaged by an incident who are most motivated to find out the true facts about what happened.
It's really easy to scoff and point at tin foil hats. It's really easy to say the government are an evil shadowy force. Neither is particularly helpful. What is useful though is to recognise that everyone involved has an agenda and a certain amount of power and look at what those agendas are likely to be, how important those agendas are and exactly how they use that power to further their agenda. Personally, I am very open minded. We know the government made some significant mistakes and questionable decisions and that they are aware of a lot more information than we are.
Whether these mistakes and knowledge add up to behaviour that would be considered unethical and harmful by the public is a very important question and it's naive and childish to just assume they will always do the right thing. History shows quite clearly where politics and big business are concerned, the stakes are high, profit and votes are king and doing the right thing is only important as a matter of PR.