> If we don’t investigate, what signal does that send to bioterrorists? Have there actually been any bioterrorists? I remember that after September 11th 2000,

> If we don’t investigate, what signal does that send to bioterrorists? Have there actually been any bioterrorists? I remember that after September 11th 2000, there was a scare regarding envelopes with supposed Anthrax in them, and that fizzled out as a false alarm (AFAICR). Now, there's plenty of other kinds of terrorism - private and state-run; and there are chemical weapons of course. And in ancient times, I read that dead bodies would be catapulted into besieged cities. But have there actually been groups of people over the past, say, 100 years who tried to release a malevolent virus into a civilian population anywhere?