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Ricin

Traces of ricin -- a deadly poison -- have been found in London. And six men are under arrest, suspected of plotting to use the toxin. NPR's Richard Harris explains what ricin is and how it can be used in bio-terrorism.

Guest:

Richard Harris
*NPR Science Correspondent

Copyright 2003 NPR

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Award-winning journalist Richard Harris has reported on a wide range of topics in science, medicine and the environment since he joined NPR in 1986. In early 2014, his focus shifted from an emphasis on climate change and the environment to biomedical research.