There are plenty of credentialed engineers who have explained why it can happen that way.
I will never believe that my own government killed 3000 innocents and blew up their huge trade center. The whole thing has been very damaging to our psyche and our economy. It took years to recover financially.
The Jihadi terrorists are a real thing. They hate us and want to kill us. Why is that so hard for people to believe?
I'm not asking about hypothetical or scientific ''explanations''.
I'm asking if you have ever seen, with your own eyeballs, such an incident,
or at least know of any such case in history.
I don't believe anyone in this forum, or anyone else on Earth for that matter, has.
Or ever will.
This ''disaster'' was unprecedented.
And virtually impossible to reproduce in another real-life situation.