HAMBURG, GERMANY - JULY 07: German Chancellor Angela Merkel officially welcomes South Korea's President Moon Jae-in to the opening day of the G20 summit on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are meeting for the July 7-8 summit. Topics high on the agenda for the summit include climate policy and development programs for African economies. (Photo by Friedemann Vogel - Pool/Getty Images)
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