Wasn't a lot of yellowcake found at that one Iraqi nuclear site? The one where the locals had dumped out the yellowcake and were using the drums as storage vessels?
Yeah, unfortunately, a lot of people got into that stuff. But we don't know for sure how long that stuff's been unguarded; that material was supposedly under seal of the IAEA at least until 1998... After that...? Who knows.
No one denies that Iraq had a lot of yellowcake, or that some of it came from Brazil, Portugal, China and Niger. It had enriched uranium as well, from France among others. That's all documented by the UN.
I think one report was that they have found more of the stuff in Iraq than they expected from the inspector's records. I haven't read it yet, though.