see more

DAMASCUS, SYRIA - OCTOBER 30: People attend mass burial ceremony for the victims killed by Assad Regime Forces' air-strike over residential areas in Douma, east of Damascus, Syria on October 30, 2015. (Photo by Muhammed Khair/Anadolu Agency/Getty Images)

DAMASCUS,  SYRIA - OCTOBER 30: People attend mass burial ceremony for the victims killed by Assad Regime Forces' air-strike over residential areas in Douma, east of Damascus, Syria on October 30, 2015. (Photo by Muhammed Khair/Anadolu Agency/Getty Images)