I don't know what the hell happened here - I hope there's a good explanation, and that this isn't a case of incompetence on our part.

CNN.com - Nuclear materials 'vanish' in Iraq - Oct 12, 2004

Equipment and materials that could be used to make nuclear weapons have disappeared from Iraq, the chief of the U.N.'s atomic watchdog agency has warned.

Satellite imagery shows entire buildings that once housed high-precision equipment that could be used to make nuclear bombs have been dismantled, the International Atomic Energy Agency said in a letter to the Security Council.

My big question is: why hasn't the known presence of material that can be used to make nuclear weapons been considered evidence of WMD?

I think it's appropriate to mention this old Fox News story here, too:

In a secret operation, the United States last month removed from Iraq nearly two tons of uranium and hundreds of highly radioactive items that could have been used in a so-called dirty bomb, the Energy Department disclosed Tuesday.

The nuclear material was secured from Iraq's former nuclear research facility and airlifted out of the country to an undisclosed Energy Department laboratory for further analysis, the department said in a statement.

Is this the same material they're now saying is missing?