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The source of the polonium used in Litvinenko's murder
A key expert witness in the public enquiry into the murder of Alexander Litvinenko, Prof Norman Dombey, tells the Â鶹ÊÓƵAV's Laurence Knight how he knows the radioactive Polonium-210 came from Russia.
(Picture: Alexander Litvinenko on his death bed in University College Hospital in November 2006; Credit: Getty Images)
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