but I admit ignorance on the subject.
Good, because if you actually watch footage and look at the impact zone, they didn't fall so well, "almost as if they were controlled demolished". It's something you can only believe if you refuse to actually spend more than 5 seconds looking into it.
Building 7 had one of the towers fucking fall on it, was seen bulging massively before collapsing, and it was pretty obvious what was going to happen, hence people getting confused and saying it had already collapsed.