I have not read the whole thread--only up to your question. But I posted several times yesterday that I and two others made note of Powell stating this the other day at the UN.
It was on the live thread and we made real-time notation of it. He said it was recent and new information and Iraq had been shopping for tubes from a "European" (un-named, obviously) country.
My posts yesterday dealt with asking if ANY media had reported on this revelation. Evidently the answer is "no". I'm thinking they don't want the answer...