[vetvetdoug]

My two cents for what it is worth:
The person studied Microbiology as a graduate student at a major university that had stock supplies of anthrax.
The person was a Teacher's assistant at that college and was likely from a Muslim country and of Arabic origin.
The person was hard to understand as a teacher's assistant and received much criticism and ostricism from the Anglo-American students.
The person was recruited by the terrorist network and received payment for services
This person is no longer in the US.

[Terrorista Nada]

Most any rancher or herder in the US or Pakistan and Afghanistan knows enough about anthrax to get it.

About a dozen animals a year in the US die from anthrax and hundreds die each year from anthrax in Pakistan and Afghanistan. Billions of spores are in the soil below a dead aninmal.

Anthrax is also called the "Fur Handler's Disease."

There is even a location in the US (NW Nebraska) that has the "Mueseum of the Fur Trade (Chadron, Nebraska); deposits of bentonite (NW Sheridan county Nebraska); and anthrax outbreaks in cattle (26 dead 1994, Sheridan county herd).

[Iwo Jima]

Yours is the best analysis that I have seen yet.

[Revolting cat!]

Your theory (post # 80,) is the most reasonable one. Why? Because it describes a totally plausible and I'd say pedestrian scenario. And most real life scenarios are quite pedestrian.

That said and going back to our brainstorming session, I still think that the date is a red herring and the "G" is the most significant letter in those, uh, letters. I don't think this G could have been written upside down, or by a right hander writing with the south paw. A foreigner from a European or South American country will be confused for the rest of his life about the proper way to write a date in a country that calls a handball game 'football'. An Arab? I dunno; it would be interesting to find out how they react to American date writing.