The problem is, of course, that you can read the propaganda of the Iranian side and the IAEA's factual assesments only channelled through sources often sympathetic to the EU-3+US side. Which sets the terms of the debate.

Where did I do that?

Sorry, was cursory reading, I completely messed up. I misread your last sentence in that post as an implicit reference that you know the following info: that the US claims that Iran imported large quantities of beryllium were disproved by IAEA a year ago. That one is in line with a series of over-egged to false claims, but not what you were speaking about.

Regarding what you were speaking about, the yellowcake impurities, worth to read this and this.

_{*Lunatic*, n.
One whose delusions are out of fashion.}