The WMD assertion is one of the most clever smokescreens of all time. Not because there weren't any WMDs, but because there was raw yellowcake suitable for a dirty bomb, AT BEST and we knew about it in 1991.
http://www.snopes.com/politics/war/yellowcake.asp <the bottom is where it shows that we knew all along he had it AND that it was already catalogued by inspectors.
Additionally, the chem weapons that Syria has now, is from Saddam. Fishy? Maybe. But not because Saddam evaded the UN but even worse is that we were the ones who sold it to them and allowed Saddam to wipe out 100,000 kurds. Thank you Ollie.