I remember watching Powell's live un testimony. I don't think it was about 'yellowcake'. It was titled something like 'Iraq's Failure to Disarm'.

The main jist of his comments were about captured mobile bio agent labs. Overall there was more testimony about chemical and biological warfare agent, and most of the nuclear comments were about centrifuges and development of delivery systems.

Most of the evidence from on the ground was from un inspectors, not C.Rove or Bush. The un resolution was based on wmd evidence not 'yellowcake'. Again, it was a un resolution, not a US resolution. Maybe, the media gravitated towards little buzzwords that stuck?

I don't think powell's post Bush years were all about smoking gun revelations, just plain ole race stirring.