The US and Russian coating processes are not known to use clays. Iraq does use dolomite clay in their process. Do you know anyone else beside Iraq who uses clays with 2-5 micron size anthrax spores? Who are the other candidates? Did Iraq give their technology to another terror state to make anthrax the Iraqi way?
What are the other possible explanations here besides Iraq in your mind? Honestly, I am open to considering others in addition to Iraq.
However, even if Iraq is shown not to have produced the anthrax or even to have been involved in the WTC attacks, I still believe the US is going to need to take out Iraq's chemical, biological and nuke weapons capabilities. IMO, we will regret it if we do not.
The Iraqi process uses a variety of clays dolomite, benonite, etc in a unique drying process that keeps the spores from clumping and airborne longer. I should have not limited my remarks just to dolomite, but to clays in general. The first report I heard was dolomite, but I think clay is a better description.