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Members of the UN Security Council meet on December 31, 2016, at the UN Headquarters in New York, after unanimously approving a resolution supporting a Russian-Turkish peace initiative for Syria, including an ongoing ceasefire and talks next month in Kazakhstan. / AFP / KENA BETANCUR (Photo credit should read KENA BETANCUR/AFP/Getty Images)

Members of the UN Security Council meet on December 31, 2016, at the UN Headquarters  in New York, after unanimously approving a resolution supporting a Russian-Turkish peace initiative for Syria, including an ongoing ceasefire and talks next month in Kazakhstan.  / AFP / KENA BETANCUR        (Photo credit should read KENA BETANCUR/AFP/Getty Images)