KGB agent killed by polonium tea still thorn in Russia-UK ties

It's a case where poison spread much further than its intended victim. Five years since the death of Russian former security agent Alexander Litvinenko in the UK. The diplomatic spat it triggered between Moscow and London shows no signs of letting up. And as RT's Laura Smith reports, the course of juctice isn't running smooth either. RT on Twitter: http://twitter.com/RT_com RT on Facebook: ht ...