who were behind 9/11?

[Marnixvdb]

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And what is a collapsing building supposed to sound like? Is it going to be silent? Its going to be very loud with lots of popping and bomb-like noises. There are going to be explosions as trusses and beams break. All that air that is being compressed has to go somewhere. So yes, its looks and souns like a demolition, but doesn't mean there was one.

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ah, thx for the logic: the fact that 9/11 looked and sounded like an foreign terrorist attack, doesnt mean there was one