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)
A picture taken on November 24, 2014, shows damaged buildings in the rebel-held Ansari disctrict of the northern Syrian city of Aleppo. Syria's war began as a peaceful revolt, but later morphed into a Sunni-dominated insurgency after President Bashar al-Assad's regime launched a massive crackdown on dissent. AFP PHOTO / BARAA AL-HALABI (Photo credit should read BARAA AL-HALABI/AFP/Getty Images)
TOPSHOT - Smoke rises from reported opposition fire from buildings in an eastern government-held neighbourhood of the northern Syrian city of Aleppo on October 20, 2016 as clashes erupted in an area designated as a humanitarian corridor for civilians to leave the embattles city, an AFP journalist said, despite an announced pause in the Syrian army's Russian-backed offensive. / AFP / GEORGE OURFALIAN (Photo credit should read GEORGE OURFALIAN/AFP/Getty Images)
