Six Arrested in London In London, six men of North African origin are detained in connection with the discovery of a deadly toxin. Ricin, tiny amounts of which can kill an adult, has been linked to al Qaeda and to Iraq. Hear Sarah Lyall of The New York Times and NPR's Richard Harris.

British Authorities Tie Six to Deadly Poison

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In London, six men of North African origin are detained in connection with the discovery of a deadly toxin. Ricin, tiny amounts of which can kill an adult, has been linked to al Qaeda and to Iraq. Hear Sarah Lyall of The New York Times and NPR's Richard Harris.