Why do people continue to perpetuate the myth that Osama and his associates were "cavemen", implying of course that they were uneducated buffoons? These were (are) well-educated men and far from being cavemen. The master planners were actually Yousef, Murad and KSM. Yousef was educated in the UK and quite brilliant. Murad studied at flight schools in the US and was a pilot. KSM also studied in the US. Osama (the financier) was also a college-educated man who left college to engage the Soviets in Afghanistan. His #2, Zawahiri is a medical doctor. And, the operational commander Atta had just earned a Masters degree!
So hardly cavemen. They were very bright men who had studied not only the US, but also our intelligence assets since the Soviet-Afghan conflict. They studied commercial aviation and knew exactly how to penetrate it. Your remarks demonstrate your ignorance of the topic at hand.