I don't recall seeing the agreement that said they got to keep chemical shells. You wouldn't happen to have a link would you? ;-)
If anyone has proof that we were involved in the Iraqi WMD program on a US government-sanctioned level, I'd like to see it.
BTW, France, Russia, and China supplied Iraq with 85% of its war material during Saddam's reign. The US supplied less than 1% (some N. European nation did the study, which you can find on the 'net).