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A rebel fighter walks inside a building on October 23, 2014 in Bustan Pasha neighbourhood of Syria's northern city of Aleppo. Opposition forces control most rural areas in northwest Syria's Idlib, large parts of Aleppo city and the surrounding province, and parts of the countryside in Damascus, Hassakeh and Daraa provinces. AFP PHOTO/AMC/FADI AL-HALABI (Photo credit should read Fadi al-Halabi/AFP/Getty Images)

A rebel fighter walks inside a building on October 23, 2014 in Bustan Pasha neighbourhood of Syria's northern city of Aleppo. Opposition forces control most rural areas in northwest Syria's Idlib, large parts of Aleppo city and the surrounding province, and parts of the countryside in Damascus, Hassakeh and Daraa provinces.    AFP PHOTO/AMC/FADI AL-HALABI        (Photo credit should read Fadi al-Halabi/AFP/Getty Images)