It is still a mystery. George Bush had every reason to orchestrate the whole thing, and the towers all came straight down very conveniently as in a controlled demolition, but there was no way of installing the explosives that we know of. I wonder if we will ever know.
If you want to know what happened, read the official 9/11 report.
Only an uneducated person believes any of the conspiracy theories.
Even if you ignore the parts that violate laws of physics, mathematics, chemistry, as well as the facts collected by actual scientists, engineers and crime site investigators, you are left with the problem that humans are lousy at keeping secrets. If 9/11 was a US conspiracy, it would have required the direct knowledge and cooperation of thousands of people in positions from the federal government, local government, local law enforcement, as well as people in the private sector (civilians) -- including those who were killed in the towers that day -- not to mention their immediate family members. Such an operation would have literally required a cast of 1000s and yet more than a decade later, not one has come forward with the truth either due to a change of conscience, or greed, or boastful pride? Not a single memo or voice message or email has ever been provided that even indicates some shadowy operation was underway, despite federal government employees misplacing thousands of laptops or phones full of confidential material? Not even the millions(!) of documents obtained by Wikileaks has any sign of anything connected to 9/11.
Meanwhile, Bin Laden was barely dead for a week before several SEALs on the team were at work consulting for TV documentaries and movies about the raid, plus numerous books.
Like I said, humans are terrible at keeping secrets.
My thought is that I would never turn control of an airplane over to someone armed with a box cutter.
I won't go into any long, convoluted conspiracies, but I do believe that the official story is not 100% true.
Questions still exist and nothing is even conclusive, especially the government's conspiracy theory, but Israel had a reason to stage the bombings and blame the global Arab Muslim community collectively. A close examination of the event reveals the a typical disproportionate number of Jews suspiciously at key points prior to, during and after the attacks, especially in the scripting, framing and presenting of the event to the public.
I have my own views on the attacks. But I want to hear a variety of views from different people.