If you'll read the story carefully, they hadn't even built it yet.
A weapon of mass destruction is considered to be a nuke, chemicals, or a biological weapon. Not a missile. Keep in mind that the Iraqis who volunteered this information denied that it was going to carry a WMD.
I don't see any basis for characterizing this as a WMD. Where am I wrong?
Now granted, our official cause for war was not just that they broke the agreement, but that they broke it and we specified developed WMD.
If you remember Powells presentation to the UN, he talked about the tubes that were being used and the illegal lenght or range of Iraq in developing missles. The Scuds they have could hit and had hit Israel during gulf war one, and was one of the things they needed to get rid of. This they obviousley did not do, since they fired them at Kuwait on at least one occasion during this war, some idiot liberals used the argument that as long as it couldn't go past a certain range, then the scud is legal, however, then it wouldn't be a scud, it would be something else.