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There are dozens of versions of that story, and not one of them makes any sense. Not even one.
Wait, what? We have kooks and Krazies here?
Well, hell, everybody knows George W. Bush planned the whole thing.
Tomorrow, on 9/11, schemes, conspiracies, and all other frivolity will not dominate my thoughts because I'll be be thinking of the people who died.
Thanks for the video. 
I very seriously doubt it. That doesn't necessarily mean there is a conspiracy, it simply means we don't know the complete truth and perhaps those in power don't / didn't either.
Not every omission of facts is part of an insidious plot, sometimes it's a matter of mismanagement, sometimes all the facts aren't there to be found or known, sometimes facts are hidden to prevent a showing of all your cards too quickly.
It could also be that the facts are there, we simply lack the ability to accept them or exposing them might upset an already tenuous geopolitical balance.
Whatever the case, I don't think there's ever any harm done by questioning official narratives. If they be true, scrutiny should reinforce, not threaten them. I'm okay with knowing I don't know it all, I'll continue to question power and its use regardless.
