9/11 was not an inside job.
Correct; however, numerous people knew it was going to happen, even myself, even though it surprised me.
Osama Bin Laden had his training camps in Afghanistan attacked by Bill Clinton with Tomohawk cruise missiles in August of 1998. His (Osama) response was (paraphrased) "I may not be able to to use $5 million dollar cruise missiles to hit you, but I can use your airplanes."
It was published in the open for everyone to read. Portions of the government knew. Portions of the government did nothing to prevent it. The reason it still surprised me was that I was envisioning remote controls and how that could be accomplished. I had no idea you could train intelligent and sane people to perform suicide missions. Live and learn (for some I guess)