No need for loud propaganda now, the course for war has already been set.
More important know is preparing for the failure to find any WMDs after invading Iraq. People in the US probably won't even hear it much, but the US will look like idiots to the rest of the world if they don't find something.
Of course, since Saddam's anthrax came from the US originally, it would be easy for us to plant some where needed. But that has great risks itself, and is to be avoided if at all possible.
Jay