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Syrian pro-government forces take part in an operation to take control of Aleppo's Suleiman al-Halabi neighbourhood, which is divided by the frontline that separates the rebel-held east and regime-held west of the northern city, on September 30, 2016. Syrian regime forces advanced in the battleground city of Aleppo, backed by a Russian air campaign that a monitor said has killed over 3,800 civilians in the past year. / AFP / GEORGES OURFALIAN (Photo credit should read GEORGES OURFALIAN/AFP/Getty Images)

Syrian pro-government forces take part in an operation to take control of Aleppo's Suleiman al-Halabi neighbourhood, which is divided by the frontline that separates the rebel-held east and regime-held west of the northern city, on September 30, 2016.
Syrian regime forces advanced in the battleground city of Aleppo, backed by a Russian air campaign that a monitor said has killed over 3,800 civilians in the past year. / AFP / GEORGES OURFALIAN        (Photo credit should read GEORGES OURFALIAN/AFP/Getty Images)