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A dust-covered civil defense member walks at a site hit by what activists say was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad, in Aleppo's Geb al-kuppah district Novamber 20, 2015. (Photo by Ameer Alhalbi/NurPhoto) (Photo by NurPhoto/NurPhoto via Getty Images)

A dust-covered civil defense member walks at a site hit by what activists say was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad, in Aleppo's Geb al-kuppah district Novamber 20, 2015. (Photo by Ameer Alhalbi/NurPhoto) (Photo by NurPhoto/NurPhoto via Getty Images)