Russian Agents with a License to Kill

Former KGB spy Alexander Litvinenko's hair fell out and his vital organs shut down after apparent ingestion of Polonium 210. Investigators have now found traces of the material at his home, a hotel and a restaurant he visited on the day he fell ill and several more sites that have not yet been identified. Before he died, Litvinenko blamed Russian President Vladimir Putin of having him killed. As the investigation continues, the British government says there's "no need for public alarm.