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Syrian government forces take position with tanks in the Saif al-Dawla district of Aleppo on August 25, 2012 as combat helicopters and tanks fired on rebel-held areas in the battered northern city. AFP PHOTO/STR (Photo credit should read STR/AFP/GettyImages)

Syrian government forces take position with tanks in the Saif al-Dawla district of Aleppo on August 25, 2012 as combat helicopters and tanks fired on rebel-held areas in the battered northern city. AFP PHOTO/STR        (Photo credit should read STR/AFP/GettyImages)