In the June, 2004 issue of Harper's Magazine by Martin Lee, there is an article about how the late Miles Copeland, a CIA agent, wrote in his memoirs about how the Secretary of State John Foster Dulles and his brother CIA Director Allan Dulles were worried by Abdul Nasser, who overthrew the puppet government of playboy King Farouk in the 1950's.
Copeland was fascinated with the way in which Billy Graham, a former Fuller Brush salesman with a mail order diploma had risen to great prominence in the US, and his goal was to find a Muslim equivalent to fund and support to moderate the nationalism (and anti-Zionism) of Nasser.
And in this way did the CIA become an accomplice of the Ikhwan, or Muslim Brotherhood, which had been founded in 1928. In 1954, an assassination attempt of Nasser was foiled, and the Brotherhood was outlawed. Many fled to Saudi Arabia. The ideological leader of the Brotherhood was Sayyid Qutb. Eventually, the Brotherhood managed to assassinate Anwar Sadat. Qutb was one of Osama bin Laden's role models as well.
Much of this is described in detail in the book Sleeping with the Devil, by Robert Baer, another CIA veteran.
So there is a lot of evidence that 9-11 was greatly attributable to the Dulles Brothers' chickens coming home to roost.
