It will be even more powerful if we can find out if these ex-Saddam regime officers that you mentioned were working or had contacts with Al Qaeda during Saddam rule. I am sure that some of them already did as the Iraqi documents reveal the meeting of Saddam intelligence with Bin Laden in 1995, and an Al Qaeda document talks about of Ayman Al Zawahiri to Iraq in 1999.
Actually the US army has the guy you need in custody :
Faruq Hijazi, who travelled several times to Afghanistan to meet Bin Laden, and who was captured in April 2003.
http://www.youtube.com/watch?v=dyEeQJN2uVQ&eurl=
Joseph. I have DIA and CIA Freedom of Information requests on these guys interrogation logs. For those alive at least. Not expecting much but it would be nice.