The anthrax thing had to be some sort of a shot across the bow on the part of the Iraqis. The stuff was particalized to such an extent that it went right through the paper of envelopes while at the same time was not weaponized or otherwise resistant to antibiotics. A very strange combination of approaches if domestically produced, but precisely what you'd expect as a warning from the Iraqis.
Obviously, nobody can be allowed to get away with such a thing.
Of course that's exactly what it was. And by itself, the anthrax threats demonstrate conclusively that Saddam was the author of 9/11. Click on the pic for a full briefing.