[You have to read past the headline, and past the lede to see that Duelfer isn't backing up his assertions with hard data.]

Weapons Inspector Testifies on Hill
Suspected Iraqi Bid To Produce Arms on Short Notice Noted
Washington Post, March 31, 2004

By Walter Pincus
Washington Post Staff Writer
The new chief U.S. weapons inspector for Iraq told Congress yesterday that no breakthrough has been made in the search for chemical or biological weapons but said new information supports a theory that Saddam Hussein may have been developing an ability to produce them on short notice.

[ ... ]

"The ISG has developed new information regarding Iraq's dual-use facilities and ongoing research suitable for a capability to produce biological or chemical agents on short notice," Duelfer said in the statement. The statement provided little information to back up that position.

After a morning session with the Senate Armed Services Committee, ranking Democrat Carl M. Levin (Mich.) said that the publicly released document left out information in Duelfer's classified testimony that "would lead one to doubt" what he described as Duelfer's "suspicions as to Iraq's activities."