U.S. Recently Produced Anthrax in a Highly Lethal Powder Form. The significance of this revelation is not that Dugway might be the source of the purified anthrax used in the Daschle and Leahy letters — spokespeople say that it is of a different strain, and that none of it has gone missing — but that this is the first disclosure of US biological weapons production since our supposed 1969 renunciation of biological warfare and destruction of our arsenal of germ agents. NY Times