Heat can weaken the beams to make them bend. A slight bend can set off a catastrophic collapse. It took almost two hours for the towers to collapse, plenty of cook time to weaken the beams. Also, it's easy to forget that in 1993 another terrorist attack looking to take down the towers involved the detonating of a half ton truck bomb at the base of the north tower. It's unknown how the structural integrity of the north tower was effected by this blast at its base, but it likely contributed.

Think about it, both bush sr and Clinton waged offensives in the region, and America has been in wars its entire history. Did America really need to blow up its own buildings to convince its people to keep doing the same shit it was already doing?

The Saudis are deflecting, because the redacted portion of the 9/11 papers includes what anyone who has read wiki leaks already knows. The Saudis are the primary funders of terrorism, and Saudi citizens and royalty were both directly involved with training the hijackers.