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Syrian people leave the city center after shelling by Syrian government forces in the center of Syria's restive northern city of Aleppo late on July 26, 2012. Fighting raged in Syria's second city Aleppo, a watchdog said, as regime forces shelled a village in Damascus province, killing five children. AFP PHOTO / BULENT KILIC (Photo credit should read BULENT KILIC/AFP/GettyImages)
Syrian people leave the city center after shelling by Syrian government forces in the center of Syria's restive northern city of Aleppo late on July 26, 2012. Fighting raged in Syria's second city Aleppo, a watchdog said, as regime forces shelled a village in Damascus province, killing five children. AFP PHOTO / BULENT KILIC (Photo credit should read BULENT KILIC/AFP/GettyImages)

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Thousands flee Syria's largest city

CNN talks to Andrew Harper, head of the UN's refugee agency, about the ongoing refugee crisis stemming from Syria.

Thousands flee Syria's largest city

CNN talks to Andrew Harper, head of the UN's refugee agency, about the ongoing refugee crisis stemming from Syria.