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Two people walking in one of the destroyed Aleppo streets, on August 28, 2014. (Photo by Karam Almasri/NurPhoto) (Photo by NurPhoto/Corbis via Getty Images)

Two people walking in one of the destroyed Aleppo streets, on August 28, 2014. (Photo by Karam Almasri/NurPhoto) (Photo by NurPhoto/Corbis via Getty Images)

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Syrians inspect rubble of a destroyed building following a reported air strike by Syrian government forces on March 7, 2014 during the Friday prayers in the Sukkari neighborhood of the northern city of Aleppo. More than 140,000 people have been killed in Syria since the start of a March 2011 uprising against the Assad family's 40-year rule. (Photo by Zein Al-Rifai/NurPhoto) (Photo by NurPhoto/Corbis via Getty Images)

Syrians inspect rubble of a destroyed building following a reported air strike by Syrian government forces on March 7, 2014 during the Friday prayers in the Sukkari neighborhood of the northern city of Aleppo. More than 140,000 people have been killed in Syria since the start of a March 2011 uprising against the Assad family's 40-year rule. (Photo by Zein Al-Rifai/NurPhoto) (Photo by NurPhoto/Corbis via Getty Images)

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A Syrian young walks on rubble past damaged buildings at a site hit by what activists said was shelling by forces loyal to Syria's President Bashar al-Assad in Aleppo's al-Shaar district February 3, 2014. (Photo by Zein Al-Rifai/NurPhoto) (Photo by NurPhoto/Corbis via Getty Images)

A Syrian young walks on rubble past damaged buildings at a site hit by what activists said was shelling by forces loyal to Syria's President Bashar al-Assad in Aleppo's al-Shaar district February 3, 2014. (Photo by Zein Al-Rifai/NurPhoto) (Photo by NurPhoto/Corbis via Getty Images)

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A woman passes in front of a Free Syrian Army checkpoint as normal life continues for some people in the parts of Aleppo controlled by the rebels. Photo: Ahmed Deeb/NurPhoto (Photo by NurPhoto/Corbis via Getty Images)

A woman passes in front of a Free Syrian Army checkpoint as normal life continues for some people in the parts of Aleppo controlled by the rebels. Photo: Ahmed Deeb/NurPhoto (Photo by NurPhoto/Corbis via Getty Images)

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Syrians inspect rubble of a destroyed building following a reported air strike by Syrian government forces on March 7, 2014 during the Friday prayers in the Sukkari neighborhood of the northern city of Aleppo. More than 140,000 people have been killed in Syria since the start of a March 2011 uprising against the Assad family's 40-year rule. (Photo by Zein Al-Rifai/NurPhoto) (Photo by NurPhoto/Corbis via Getty Images)

Syrians inspect rubble of a destroyed building following a reported air strike by Syrian government forces on March 7, 2014 during the Friday prayers in the Sukkari neighborhood of the northern city of Aleppo. More than 140,000 people have been killed in Syria since the start of a March 2011 uprising against the Assad family's 40-year rule. (Photo by Zein Al-Rifai/NurPhoto) (Photo by NurPhoto/Corbis via Getty Images)