(1) In the aftermath of that day there *were* discussions and building code changes directly because of 9/11, addressing, among other things, the potential for collapse due to burnout. One starting point is the International Code Council http://www.iccsafe.org/ (search for "WTC").
(2) You say "burning far worse than it" but even the infowars article quotes the line about the Chechnya tower burning a lot of exterior plastic trim but leaving the interior untouched. How is that "far worse"?
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