I'm going to venture and say that the majority of what happened on 9/11 was pure incompetence and then the attempt to cover up said incompetence. Nonetheless, today we do have to remember the victims whether we like one theory or another.

Since your post is about lies, I'll tell you something that's true: During 9/11, while there was mayhem in NYC (irrelevant what we opt to believe it was caused by), Starbucks refused to provide water to the rescuers for the victims for free. Rescuers had to purchase the water from Starbucks. Starbucks later apologised, of course. I know this to be 100% true as a close friend was one of the rescuers purchasing the water.