Something penetrates the building before the plane does.
Before you try to rebuke this, know that anyone could have done it and this evidence does not blame anyone, but only shows that a missile was used.
Net question...who did this?
Look at the still photo of the missile under the nose of the plane on the link above - its a missile, its there, its distinct. And the military were the only ones who wouldn;t comment on it, saying it was... (go watch it again and ask why anyone would evade such a question, rather than just speak up and say 'yes, its a missile').
