Most of 9/11 is readily explained.
WTC was a tube, with relatively poor adherence of fire protective coatings. Sufficient columns were severed, extreme heat did the rest, same reason "steel shed" universal beams fold like liquorice during fires. Future high rise will rely on a concrete reinforced core so fire rating in terms of structural collapse is vastly better.
The other buildings were unique construction re housing multiple TX re substation and backup diesel storage.
The only peculiar part of 9/11 is why the military exercise was delayed a day until 9/11.
The only peculiar part of Iraq invasion is that the New American Century had called for it, and even Alan "Bubble Magoo" Greenspan states the invasion was to realise oil assets that Saddam was letting rot thereby producing an even worse oil spike & induced recession in a credit bubble era "on Bush's watch" than we actually had. Plus of course republican admin usually coincide with wars and democrat admin usually coincide with deficit expansion. Bush of course managed to expand everything in the wrong direction. He did something right though, just can't remember what it is right now.
China is seizing much of Africa and cheap (& increasingly disgruntled) labour re commodity reserves, along with now buying commodity companies around the West. West meanwhile is not only ensuring energy supply but agricultural supply via imperialism.
So nothing much changed then.
The only likely "viable" part of 9/11 is that someone or some in the USA "looked the other way" re New American Century crowd. They needed a fundamental change and historic Princeton/Cambridge thinking is you never call for a war, you let events force the people to call for one. You cry the people are being attacked. Nothing changed then, same s*it, different era, different day.