If you are going to make such claims, please elaborate on them.
I worked on a US Airforce base for about three years as a flight instructor (civilian contractor), so I know a bit about the ins and outs of the air transportation system in the US -- both military and civilian ops. I have also flown as a mission pilot with the US Civil Air Patrol. It's very easy to mis-lead the general populataion regards aviation, how planes fly, and what pilots do. After all, a good chunk of the population actually believes that an aircraft's engine has failed when the aircraft stalls.
It would be difficult for me to go into detail about every single incident that doesn't quite make sense, because there are lots, and this would become a very long post if I picked every aspect of the 9-11 flights apart. Since I don't really like making long posts, I'm going to generalise.
The complete failure of the ATC system that day puzzles me and most other pilots I've spoken to about the incident. For 9-11 to have happened the way we are told it happened means that every controller involved with the flights in question failed to follow the most basic normal and emergency operating procedures that have been set in place. It amounts to a collective tossing of the rules right out the window and saying, "Let's just.. do everything different today."
There is no way that student pilots, especially students with the rather questionable skills the supposed 9-11 perpetrators were reported to have had, could have manuevered those planes, and flown them with such precision into the towers the way they were presented as having done. I've flown with students, lots of them. Every once in a while every flight instructor comes across a mediocre student. Every flight student in the US must eventually pass an flight test with an FAA inspector, and the reputation of the flight school rests on the quality of the students it graduates. Flight schools don't like to give up on a student, and instructors will work very diligently to get a mediocre student through the training that, frankly, most students pay alot of money for. For one of the flight schools to have let one of these men go because he just couldn't handle the tasks being set before him tells me alot. It tell me that the guy, to put it bluntly, majorly sucked as a pilot. It's impossible for me to believe that those men manuevered those planes the way they did, and flew them into the towers. Could they have programmed the on board auto-pilot to fly the planes into the towers? Maybe. But considering their rather dubious talent, and the relatively short amount of time the planes were in the air, I don't think they did.
The flight that bothers me the most is the one crashed into the pentagon building. I've seen a couple of crash sites, and frankly, the physical crash site at the pentagon did not jive with what we are told happened.
~ edited for typos