Why is anthrax the bio-weapon of choice amoung terrorists?
Anthrax is believed to be a favorite bio-weapon of larger terrorist groups because it is highly lethal (it contains 100 million lethal doses per gram of anthrax material which is 100,000 times stronger than the deadliest chemical warfare agent); the cost to make anthrax is relatively low compared to other bio-weapons; anthrax is low-tech and knowledge of it is widely available; it is easy to produce in large quantities; it is extremely stable; it can be stored almost indefinitely as a dry powder; and it is easy to weaponize.