US President Barack Obama disembarks from Air Force One as he arrives in Saint Petersburg on September 5, 2013 to attend G20 summit. World leaders meet Thursday at a G20 summit in Russia where Obama will strive to bridge deep divisions over his push for military action against the Syrian regime’s alleged use of chemical weapons. AFP PHOTO / KIRILL KUDRYAVTSEV (Photo credit should read KIRILL KUDRYAVTSEV/AFP/Getty Images)
