The heart of the matter, I believe. The Administration can't prove it or it likely would have made the information public by now. But I think they believe the anthrax used in the 2001 attacks on the UNITED STATES CAPITOL and elsewhere in this country came from Iraq. I believe the Administration is correct in this assumption.
I've long felt sure of this. While I'm no expert on the handling of dangerous pathogens it wouldn't surprise me if before the U.S. supplied anthrax to any nation (and any nation with a large agricultural research sector could have legitimate use for it, I believe) it would if it could (here's the gaping hole in my knowledge) somehow "tag" the germs so if it did fall into the wrong hands (or was sold) they could tell who transferred it.
Remember the timeline: WTC, anthrax and then Axis of Evil. GWB didn't just throw Iraq in there to fill up a blank line on his dance card. They knew immediately once they had a chance to test it, IMHO.
BTW, thanks for the kind reply yesterday :-)