Must be an accident.
Actually, I think it is exactly the opposite.
Americans can accept another terrorist attack, after all we've been warned.
What the people cannot accept is an Administration that will lie about it.
There is absolutely no basis for anybody to say that this is "probably a mechanical failure".
If the official line persists in putting out this preposterous nonsense at this stage of the investigation, especially in light of the eyewitness accounts, commercial aviation is in for major hard times.
Many people seem to have convinced themselves that on Sept 11, there were 4 separate accidents involving planes, and they do not want to believe we are under attack even though there's a Jihad declared against us.