Members of the Bush administation offered evidence under oath.
In Lawsuit, Team Bush Swore Saddam Was Behind 9/11In March 2003, Judge Baer held two days of hearings to determine the amount of damages that should be awarded to the families......
The most convincing evidence came from testimony by former CIA Director James Woolsey, a member of the administration's Defense Policy Board, and statements made by Colin Powell and George Tenet.
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He cited some specific statements that he relied upon in formulating a believe that there was a link between Saddam and 9/11, and included the following from Tenet and Powell:
...Both Director Tenet and Secretary Powell mentioned 'senior level contacts' between Iraq and al Qaeda going back to the early 1990s
; both mentioned that al Qaeda sought to acquire poison gas and training in its use from Iraq; both mentioned that al Qaeda members have been in Iraq, including Baghdad, after September 2001. ...
Director Tenet's carefully worded letter included in substance the same allegations, but with less detail, that Secretary of State Colin Powell made before the U.N. Security Counsel on Feb. 5, 2003, in his remarks about 'the potentially much more sinister nexus between Iraq and the al-Qaida terrorist network.' ... http://www.democraticunderground.com/articles/05/11/17_lawsuit.html