Conversation so far:
who was the anthrax hoax victim?
Miller opened an anthrax hoax letter mailed to her New York Times office.
then what happened?
The 2001 anthrax attacks had begun occurring in the wake of the September 11 attacks in 2001.

Question: what more is known about the attack?
Self-contained rewrite: Other than the name of the victim, Judith Miller, what more is known about the anthrax hoax attack?