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Russia's President Vladimir Putin meets with his Chinese counterpart Xi Jinping at the G20 Summit in Strelna near St. Petersburg

Russia's President Vladimir Putin (R) meets with his Chinese counterpart Xi Jinping at the G20 Summit in Strelna near St. Petersburg, September 5, 2013. REUTERS/Alexander Nemenov/Pool

World leaders meet at G20 summit

World leaders from G20 are meeting in St Petersburg, Russia, with the crisis in Syria high on the agenda.