Korea has nothing to do with the facts of Iraq. Rumsfeld said they haven't found the actual weapons - YET. What we have found is parts of their weapons PROGRAM. President Bush told EVERYONE that we were NOT going to wait for the threat from Iraq to be IMMINENT. And he was right. Iraq had every intention of re-constituting its WMD programs as soon as the sanctions were lifted. In order to do this, Saddam had his weapons programs scattered all over the country. We've found pieces of it.
The whole point about Saddam gassing the Kurds in 1988 was not to so much suggest he had chemical tipped warheads ready to fire at a moments notice. It was used as proof that Saddam had no qualms about using such horrible weapons. People also forget, including the news agencies, that while we were in Afghanistan, we found videos of Al Quaeda experimenting on animals with poison gases.
So in Iraq, the analogy is this. If Mosul had a Mr. Coffee machine, and Tikrit had coffee filters, and Bahgdad had coffee grounds, and another city had water - technically Saddam didn't have any coffee. We knew Osama wanted coffee. We knew Osama wanted to destroy the US. So you are the president, what would you have done?