Syrian pupils listen and write during class in a school in the rebel-held Eastern Ghouta town of Douma on September 18, 2017.  
Syria's six-year conflict has ravaged its infrastructure and caused losses to its economy of $226 billion, according to estimates published by the World Bank. / AFP PHOTO / AMER ALMOHIBANY        (Photo credit should read AMER ALMOHIBANY/AFP/Getty Images)