Where is your proof of 19 Arab Hijackers? Because the government posted pictures of them? Really? The only 'proof' of anything is that airplanes hit the WTC complex and that a lot of people died. Just because the government doesn't talk about something doesn't mean it doesn't happen. Obviously it doesn't mean it DOES happen either. Personally, given the gigantic liability that the US Government has in failing to prevent 9/11, I trust what they say on the topic very very little.