Science  20 Sep 2002:
Vol. 297, Issue 5589, pp. 1963b
DOI: 10.1126/science.297.5589.1963b

Straight answers to hundreds of questions about terrorism distinguish this online encyclopedia, just released by the nonpartisan Council on Foreign Relations. In addition to discussing subjects such as the identities and agendas of terrorist groups, the site evaluates scientific topics such as the threat from biological weapons, chemical agents, and nuclear bombs. The authors rate the odds of a smallpox attack as low because of the difficulty of obtaining and growing the virus.

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