You are right, the guys closer to Bagdad, so deeply implicated in the Saddam regime, know they will answer for crimes against humanity, those are the types who will not hesistate to use poison gas. They have nothing to lose.
On the other hand, I am sure the military is well prepared to deal with them.
It would be the first time our troops latest Nuclear/Biological/Chemical gear & tactics were tested against an organized threat. My concern is decon H2O.