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German Chancellor Angela Merkel receives flowers as she arrives to take part in the G20 Summit in St. Petersburg

German Chancellor Angela Merkel receives flowers as she arrives to take part in the G20 Summit in St. Petersburg, September 5, 2013. REUTERS/Alexei Filippov/RIA Novosti/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.