Yes, just nine months
But it's perfectly OK to think cavemen in Afghanistan planned it and were able to overcome the logistics like air defences and making buildings a block away collapse.
The official story is not fact. It is theory that is lopsided to favor the version of events they claim. If you are truly objective and look at ALL the evidence without trying to assess blame from the start you can find the official story is not true. You at least owe that to yourself.
But then again if you still leave milk and cookies for Santa you don't deserve truth.