U.S. forces take into custody one of Iraq's top biological weapons experts, nicknamed "Dr. Germ" for her work in the production of biological warfare agents such as anthrax and botulinum toxin. Rihab Taha, a British-educated microbiologist, was not on the U.S. list of 55 most-wanted Iraqis, but U.S. officials say her capture was still a top priority. Hear NPR's Tom Gjelten.
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