President Barack Obama, center, participates in a group photo with other leaders during the G20 Summit in Antalya, Turkey, Sunday, Nov. 15, 2015. Obama is attending the G20 Summit while on a nine-day foreign trip that also includes stops in the Philippines and Malaysia for other global security and economic summits. Joining Obama in the front row are, from left, China's President Xi Jinping, Turkey's President Recep Tayyip Erdogan, Brazil's President Dilma Rousseff, and Russia's President Vladimir Putin. (AP Photo/Susan Walsh)
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