US President Barack Obama (2nd L) talks with India's Prime Minister Narendra Modi (L) as G20 leaders and their spouses walk across the ground for a group picture prior to a dinner banquet at the G20 Summit in Hangzhou on September 4, 2016. G20 leaders confront a sluggish global economy and the winds of populism as they open annual talks, but the long war in Syria and the South China Sea territorial dispute hang over the summit. / AFP PHOTO / Johannes EISELEJOHANNES EISELE/AFP/Getty Images