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  Aleppo one of 'most devastating urban conflicts': Red Cross

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  Russia says close to joint military action with U.S. in Aleppo: agencies

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  Jets pound rebels after they break Aleppo siege

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  Syria rebels in huge attack to break Aleppo siege

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  Islamic State claims Syria blasts that kill dozens

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  Syrian army secures road to Aleppo: state TV

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  Russian cruise missiles target Syria

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  Iraq militia fighters join battle for Syria's Aleppo

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  Syrian forces besiege rebel-held Aleppo as Turkish-backed fighters drive Islamic State from border

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  Aleppo rebels brace for long Syrian government siege

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  Fight for Syria's Aleppo exposes limits of Russian air power

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  U.N. Syria envoy presses for speedy Aleppo aid delivery

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  Russia backs 48-hour Aleppo truce, U.N. wants other sides to commit

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  All Syria parties must commit to Aleppo aid truce, not just Russia: U.N.

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  Older brother of Syrian boy pictured in Aleppo dies

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  Russian helicopter downed in rebel-held Idlib province

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  Harrowing video shows dazed, bloodied boy pulled from Aleppo rubble

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  Heavy fighting in Aleppo as Syrian rebels renew their assault: monitor

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  Syria ceasefire approaches with Assad emboldened, opposition wary

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  Russia announces daily ceasefires in Syria's Aleppo to let in aid

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