Russias President Vladimir Putin (L) welcomes US President Barack Obama at the start of the G20 summit on September 5, 2013 in Saint Petersburg. Russia hosts the G20 summit hoping to push forward an agenda to stimulate growth but with world leaders distracted by divisions on the prospect of US-led military action in Syria. AFP PHOTO/POOL/Pablo Martinez Monsivais (Photo credit should read PABLO MARTINEZ MONSIVAIS/AFP via Getty Images)
