Which of the various documentaries on 9/11 have you watched to draw your conclusion?
Oh, none?
Which of the 30-year experience architects and ivy league engineers have you read or watched?
Oh, none?
Yeah, that figures. Just read the GOP crap response but ignore the professionals from Harvard and MIT and their fascinating presentations.
You want formal papers in Architechtural Journals? So you're like the anti-veg type who doesn't buy the benefits of a vegan diet unless the AMA or some conservative corporate journal comes out and prints something favorable. Yeah, I know you GOP types...
One place to start, if you're actually serious about examining the 9/11 situation, is the link below, Archetects and Engineers for 911 Truth.
Also, if you want to actually discuss this situation with any intelligence, get this film: