Three years on, I think that what happened with regard to Iraq's weapons has become fairly clear. At least, to me.
Here's what we know:
1) There was massive intelligence suggesting that Iraq posessed weapons of mass destruction. This is almost universally agreed upon.
2) No satisfactory explanation of what happened to them has ever been officially offered. I don't believe Saddam got rid of them voluntarily, as some would have us believe. Nor is it possible - given what we know - that they were never there.
3) The most obvious explanation is that they were moved.
But, if they were moved, why would they have been moved, who would have moved them, and where would they have been moved to?
I don't know all of it. But here's what I think.
Russia was involved, during the 1990's, in supplying additional WMD to Iraq - probably in exchange for hard cash. When war became imminent, they repossessed the weapons - offering Saddam diplomatic support (and possibly other weapons) in exchange.
The Administration has been aware of this. Probably for years. That's why they've remained strangely silent about possible movement of the weapons.
Simply put, if it were to be revealed to the American people that was what had happened, the United States and Russia would become enemies once more.