And of course the word of those two sadistic murders is plenty good enough for you.
Saddam had plenty of time and diplomatic cover by his allies in France, Germany and Russia to either remove, hide or destroy his WMD's.
Nobody can find them, bub. Mighta, coulda, woulda is all we had in the way of "evidence" of WMDs-- we've sent hundred of American young people to their graves (and consigned thousands of others to lives without limbs - and other massive injuries) without any evidence that Iraq has WMDS. And it looks like the reason we had no evidence is that there WEREN'T WMDs.