Residents look for survivors under debris after what activists say were four air strikes by forces loyal to Syria's President Bashar al-Assad in Douma, eastern al-Ghouta, near Damascus September 24, 2014. (Photo by Bassam Khabieh/Reuters)





A youth pushes pink couches on a cart in the town of Douma, eastern Ghouta in Damascus, Syria, January 5, 2016. (Photo by Bassam Khabieh/Reuters)





A resident rides his bicycle near what activists said was an exploded cluster bomb shell in the town of Douma, eastern Ghouta in Damascus November 5, 2015. (Photo by Bassam Khabieh/Reuters)





The body of a dead girl is seen after Syrian government forces fired missiles on a busy marketplace in the Douma neighborhood of Damascus, Syria October 30, 2015. At least 40 people were killed and about 100 wounded after Syrian government forces fired missiles into the market place in a town near Damascus, a conflict monitor and a local rescue group said. (Photo by Bassam Khabieh/Reuters)





Children ride on a makeshift merry-go-round made from remnants of Russian bombs at a basement in the Duma neighbourhood in Damascus, on the second day of Eid al-Adha October 16, 2013. Abou Ali al-Bitar is using remnants of weapons including rockets, mortar shells, bullet casings to create ornamental objects, musical instruments and toys for children to entertain them during Eid al-Adha. (Photo by Bassam Khabieh/Reuters)





A rebel fighter gestures as he runs across a street in Mleha suburb of Damascus, during what the rebel fighters said was an offensive against them by forces loyal to Syria's President Bashar al-Assad, April 2, 2014. (Photo by Bassam Khabieh/Reuters)





A boy writes on a dusty mirror in a damaged house in the rebel held besieged city of Douma, a suburb of Damascus, Syria February 27, 2016. (Photo by Bassam Khabieh/Reuters)





A man inspects a shirt of his dead son, who died the day before, after an airstrike in the rebel-held besieged city of Douma, a suburb of Damascus, Syria February 27, 2016. (Photo by Bassam Khabieh/Reuters)





A fire trail is seen during clashes between forces loyal to Syria's President Bashar al-Assad and the Army of Islam fighters, on the eastern mountains of Qalamoun overlooking the town of Douma, eastern Ghouta, near Damascus, Syria October 1, 2015. (Photo by Bassam Khabieh/Reuters)





Men carry a body of a boy, removed from under rubble, at a site hit by what activists said was an airstrike by forces loyal to Syrian President Bashar al-Assad in the Duma neighbourhood of Damascus January 7, 2014. (Photo by Bassam Khabieh/Reuters)





Medics treat injured people inside a field hospital after what activists said were air and missile strikes in the Douma neighborhood of Damascus, Syria December 13, 2015. (Photo by Bassam Khabieh/Reuters)





Children play in the Douma neighborhood of Damascus, Syria November 26, 2015. (Photo by Bassam Khabieh/Reuters)





Bodies of people activists say were killed by nerve gas in the Ghouta region are seen in the Duma neighbourhood of Damascus August 21, 2013. Syrian activists said at least 213 people, including women and children, were killed in a nerve gas attack by President Bashar al-Assad's forces on rebel-held districts of the Ghouta region east of Damascus. (Photo by Bassam Khabieh/Reuters)





Employees work inside a garment factory in the besieged town of Douma, near Damascus, Syria, December 21, 2015. (Photo by Bassam Khabieh/Reuters)





A Free Syrian Army fighter carries a copy of the Koran as he walks along a street in Jobar, a suburb of Damascus, Syria July 6, 2015. (Photo by Bassam Khabieh/Reuters)





A boy fills a container with water in the town of Douma, eastern Ghouta in Damascus, Syria November 17, 2015. (Photo by Bassam Khabieh/Reuters)





A man holds a child that he said survived shelling from forces loyal to President Bashar al-Assad, along a street in Duma neighborhood in Damascus, November 17, 2013. (Photo by Bassam Khabieh/Reuters)





Prosthesis are seen at a welfare workshop in the Duma neighborhood in Damascus October 24, 2013. The center produces prosthesis from different materials including remnants of weapons, plastic mannequins and water barrels, and offer them to physically disabled victims of the war. (Photo by Bassam Khabieh/Reuters)





A girl is being evacuated from a site hit by what activists said were airstrikes by forces loyal to Syria's President Bashar al-Assad in the Douma neighborhood of Damascus, Syria August 24, 2015. (Photo by Bassam Khabieh/Reuters)





Nour, a 9 year-old girl, who lives in the rebel-held neighborhood of Jobar in Damascus, plays on an inflatable slide in the neighboring suburb of Hamouriyeh, where they came to celebrate the Muslim holiday of Eid al-Fitr, which marks the end of the holy month of Ramadan, Syria July 18, 2015. (Photo by Bassam Khabieh/Reuters)





An injured student rests inside a field hospital after what activists said were air and missile strikes in the Douma neighborhood of Damascus, Syria December 13, 2015. (Photo by Bassam Khabieh/Reuters)





A rebel fighter from the Free Syrian Army's Al Rahman legion takes up position behind sandbags in Jobar, a suburb of Damascus December 22, 2014. (Photo by Bassam Khabieh/Reuters)





A burnt lamp is seen inside a damaged house in the Duma neighborhood of Damascus December 14, 2014. (Photo by Bassam Khabieh/Reuters)





Men hold up a baby saved from under rubble, who survived what activists say was an airstrike by forces loyal to Syrian President Bashar al-Assad in the Duma neighborhood of Damascus January 7, 2014. (Photo by Bassam Khabieh/Reuters)





A man walks on the rubble of damaged buildings in the rebel-controlled area of Jobar, a suburb of Damascus, Syria March 2, 2016. (Photo by Bassam Khabieh/Reuters)





Rebel fighters take part in a military display as part of a graduation ceremony at a camp in eastern al-Ghouta, near Damascus, Syria July 12, 2015. The newly graduated rebel fighters, who went through military training, will join the the Free Syrian Army's Al Rahman legion. (Photo by Bassam Khabieh/Reuters)





A man carries an injured girl after what activists said were five air strikes by forces loyal to Syria's President Bashar al-Assad in Douma, eastern al-Ghouta, near Damascus September 11, 2014. (Photo by Bassam Khabieh/Reuters)





A father reacts while trying to search for his daughters under the rubble at a site hit by what activists say was an air strike by forces loyal to Syrian President Bashar al-Assad in the Duma neighborhood of Damascus November 4, 2013. (Photo by Bassam Khabieh/Reuters)





A boy sits on a wheel in front of the bullet-riddled facade of a mosque on the first day of Eid al-Adha in the Duma neighborhood in Damascus October 4, 2014. (Photo by Bassam Khabieh/Reuters)





An injured boy who is undergoing surgery, after he was injured in what activists said was an airstrike by forces loyal to Syria's president Bashar al-Assad, rests inside a field hospital in the Douma neighborhood of Damascus, Syria December 5, 2015. (Photo by Bassam Khabieh/Reuters)