Anthrax Scare Closes 11 D.C.-Area Post Offices
Eleven post offices around the Washington, D.C. area are closed after a sensor at one of them detected a substance that could be anthrax spores. Postal officials say it's not clear yet whether anthrax spores are present in the facility that processes mail for federal agencies, but that they are taking no chances. Hear NPR's Jon Hamilton.
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