Ramzi Yousef (1993 WTC) and Terry Nichols (OKC) crossed paths in the Phillipines. Khalid Sheikh Mohammed (9/11) was Yousef's uncle. It is interesting to note that Yousef entered the United States on an Iraqi passport and had been known among the New York fundamentalists as "Rashid, the Iraqi". Another name that could be thrown into the mix is Abdul Rahman Yasin, a U.S. citizen who moved to Iraq in the 1960's and returned to the U.S. in 1992. After the 1993 WTC bombing, Yasin fled to Iraq and was given a monthly salary and housing by Saddam Hussein's regime.
The logical path for these two would be: Saddam would supply the WMD, Usama would supply the where, when and how...Terrorist textbook stuff!! It's why I still think the Anthrax attack will lead back to Iraq.
I have no doubts that Ramzi Yousef had Iraqi links and that Saddam was involved in the FIRST World Trade Center attack.
However after that there is only circumstantial evidence linking Iraq to any Al-Qaeda activity in relation to 9/11.
Saddam was a crafty bugger who outlasted two Presidents. He knew that by the time President Bush II was elected, his time for farnarkling about had well and truly passed.