And you know where the source of that "WMD" is from? I think if they can demonstrate that it was part of Saddam's arsenal that he knew about it, then yes it proves the WMD theory. Until then, one can only speculate on the source. Who is to say that it was not an unspent warhead from the Iran/Iraq war that someone found and tried to improvise into a weapon to be used against the "coalition"? The reports I have read indicate that it was not being used conventionally and that the users possibly were not even aware that it contained Sarin.