The problem is that it was a false flag operation by the US government. Over 3,000 members of Architects and Engineers for 9/11 truth dismissed the official government conclusion that the planes brought the buildings down. I was in New York City that day, just nowhere near downtown.
one of my brothers was due to perform there the day it happened
the tour was cancelled before the attack
I keep one of those packs of cards with terrorists on them as a souvenir from a visit my other brother made there after the attack