What has been utterly misunderstood, misrepresented, and lost amid the babble of speculation and intrigue, is that Iraq didn't need yellowcake. They'd had a million pounds of it sitting around "in country" for over a decade, but with no viable means whatsoever of making it into nuclear weapons.
It is all about the cover-up.
Q: How could so many supposedly smart people have made that many "honest mistakes" about the Iraq WMD intelligence?
A: They couldn't have. Not in a million years.