Can't blame them, then
Bush approved use of tear gas in Iraq today. This pretty much validates the possession of chem warfare suits by the Iraqis. Turns out that when the Senate ratified the Chemical Weapons Convention way back when, they added language permitting battlefield use of riot-control agents with presidental approval. The CWC defines toxic chemicals (original) as “Any chemical which through its chemical action on life processes can cause death, temporary incapacitation or permanent harm to humans or animals.” So tear gas definitely qualifies. It also mentions (in the same article) that domestic riot control is not prohibited. Iraq’s hardly domestic, of course. ...