Plenty of architects and engineers have come forward and said this looked like a controlled demolition. The conspiracy is we did this to get into the middle east, the American people would get behind it and so on. Hence the "Weapons of mass destruction" lie bush put out there. There never was any. I can't say i am full blown on this conspiracy but it's something to think about. On September 10th donald rumsfeld made a speech that the pentagon lost almost 3 trillion dollars worth of unaccounted for expenses, the next day, 9/11.
There is a lot to this and some things are very weird, not completely saying it didn't happen but false flags are a real thing, operation northwoods for example which is proven and we were going to attack our own US citizens and the military then blaming it on the cuban government to justify starting a war with them. That was real. So no wonder why some of us question these things. That's why you should never trust the CIA,FBI, just the government in general. So much corruption has happened, powerful people who can do powerful things and use the media to make everybody believe it