Smoke rises after rebel fighters launch a mortar shell on residential neighborhood in west Aleppo, Syria, Monday, Dec. 5, 2016. The government seized large swaths of the Aleppo enclave under rebel control since 2012 in the offensive that began last week. The fighting was most intense Monday near the dividing line between east and west Aleppo as government and allied troops push their way from the eastern flank, reaching within less than a kilometer (half a mile) from the citadel that anchors the center of the city.(AP Photo/Hassan Ammar)
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