Pentagon targeted:

Sensors at two military mail facilities in the Washington area detected signs of anthrax on two pieces of mail Monday, but Pentagon officials said the mail had already been irradiated, rendering any anthrax inert.

Officials weren't sure if this was an attack. Additional tests and other sensors at the two facilities, one of them at the Pentagon and the other nearby, found no presence of the bacteria, which can be used as a biological weapon. There were no initial reports of illness.

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