A known CIA asset did 9/11 which was a plot the US had for a while. We know this because tom clancy wrote a book about it. And at least by the end of his career it looks like natsec dismiss would brag to him about their plots so he would write a book glorifying their work. It was an episode of X-files. Isreal did 9-11 is a standard smokescreen we use by blaming things on insreal that we want people to lose the thread on.

Now, if thr fomer cia asset that protected by the US did the mission under cia direction or not is hard to say. I doubt people in cia the know for sure