Russian President Vladimir Putin holds out his arms as he walks past U.S. President Barack Obama (centre L) during a group photo at the G20 Summit in St. Petersburg September 6, 2013. Above Obama is British Prime Minister David Cameron, above Putin is German Chancellor Angela Merkel. At right is Indonesian President Susilo Bambang Yudhoyono. REUTERS/Kevin Lamarque (RUSSIA - Tags: TPX IMAGES OF THE DAY BUSINESS POLITICS)