Funny, Bush never talks about the anthrax terrorist. He also never talks about his rather suspiciously timed smallpox immunization campaign, and the injuries that caused.
A few remember - at least about the anthrax. Tara Smith write about Anthrax--where are we, almost 5 years later?. Turns out, we seem to be where we started. Some good links. Nice to see she reads the illustrious Mr. Schneier.
TS links to the excellent wikipedia article. A mystery indeed.