Syrians celebrate on December 22, 2016 in the northern Syrian city of Aleppo, after the army said it has retaken full control of the country's second city The army said it has retaken full control of Syria's devastated second city Aleppo, scoring its biggest victory against opposition forces since the civil war erupted in 2011. / AFP / George OURFALIAN (Photo credit should read GEORGE OURFALIAN/AFP/Getty Images)
