France's President Francois Hollande (L) meets with Russia's President Vladimir Putin (R) during the G20 Leaders Summit in Hangzhou, Zhejiang province, 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 / STEPHANE DE SAKUTINSTEPHANE DE SAKUTIN/AFP/Getty Images