Avoiding Armageddon, Part 1, Silent Killers: Poisons and Plagues

Biological and chemical weapons such as sarin, anthrax, plague, smallpox, and VX gas can claim more lives over greater distances than a nuclear bomb—and are easier to make and use. This look at historical uses of these types of weapons by both governments and terrorists also examines who might have them and be willing to use them now.