S.J. Resolution 23 - Authorization for Use of Military Force (Enrolled Bill); September 18, 2001
The operative words up there seem to be "aided or harbored."
Did Saddam have to be personally involved in 9/11 for him to have "aided or harbored" those "nations, organizations or persons" who were directly responsible?
Of course not....and evidence of Saddam's personal involvement in a very specific, clandestine decision is unlikely to surface.
Unless they bring in a Janet Reno look alike in a US Army uniform, holding a lease and a pair of panties. Then you never know what he might blab about.