theres videos of molten metal spewing out the side of the building. people claim, oh thats aluminium, guess what aluminium doesnt glow bright orange when molten. And your statement about people not noticing thermite being applied, have a guess who runs security for the buildings, Bush's cousin and brother. the towers where office buildings, so its safe to say that operated normal business hours. Whats to stop a group of men installing what was needed when office hours where closed?