Russian President Vladimir Putin (R) looks down at the start of his meeting with Britain's Prime Minister David Cameron at the Bocharov Ruchei state residence in Sochi May 10, 2013. REUTERS/Sergei ... more 

Russian President Vladimir Putin (R) looks down at the start of his meeting with Britain's Prime Minister David Cameron at the Bocharov Ruchei state residence in Sochi May 10, 2013. REUTERS/Sergei Karpukhin (RUSSIA - Tags: POLITICS) less