[Cicero]

One contributing cause of the collapse was that they stopped using asbestos insulation part way up the buildings because of the anti-asbestos craze.

[carton253]

Yes, there may have been contributing causes... but the reason those towers went down was because of the planes. To get lost in the contributing causes is, in my opinion, senseless and useless. No planes... the Towers still stand.

Let's keep our eyes on the real culprit.