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HANGZHOU, CHINA - SEPTEMBER 4: Russian President Vladimir Putin attends the opening ceremony of the G-20 Summit on September 4, 2016 in Hangzhou, China. World leaders are gathering for the 11th G20 Summit from September 4-5. (Photo by Mark Schiefelbein - Pool/Getty Images)

HANGZHOU, CHINA - SEPTEMBER 4:  Russian President Vladimir Putin attends the opening ceremony of the G-20 Summit on September 4, 2016 in Hangzhou, China. World leaders are gathering for the 11th G20 Summit from September 4-5. (Photo by Mark Schiefelbein - Pool/Getty Images)