I've examined it through the lens of all the evidence and an understanding of engineering. No reason to doubt what happened. Whenever I find someone intending to "educate" me, I have generally found someone who is simply ignorant of such things as civil engineering, aircraft engineering, and aeronautics. Plenty of declarations of what is "impossible" or "inevitable," when no such truth exists. And a strange desire to trivialize the hundreds of airplane deaths that occurred, while having nothing to say about the thousands of victims on the ground.

Mind you, I'm only talking about the events themselves. The jury is still out on the ultimate responsibility for the plan.