Children carry milk for sale in Old Aleppo January 1, 2015. (Photo by Mahmoud Hebbo/Reuters)

A street vendor sells fuel in the rebel-held area of Aleppo's al-Shaar neighbourhood January 2, 2015. (Photo by Hosam Katan/Reuters)

Men wash blood off a coffin along a street in Jabal al-Zawiya in the southern countryside of Idlib January 4, 2015. (Photo by Reuters/Stringer)

A blacksmith works at his shop in the old city of Aleppo January 6, 2015. (Photo by Jalal Al-Mamo/Reuters)

A boy cuts firewood to be used for heating inside a shop in the old city of Aleppo January 6, 2015. (Photo by Jalal Al-Mamo/Reuters)

A boy covers himself from cold as he sits in front of heaters for sale in al-Sukari neighborhood of Aleppo January 8, 2015. (Photo by Hosam Katan/Reuters)

Scavengers sift through garbage at a rubbish dump in Aleppo January 21, 2015. (Photo by Jalal Al-Mamo/Reuters)

A clothes vendor arranges items near a mannequin dressed in a traditional niqab inside a shop in Aleppo January 22, 2015. (Photo by Jalal Al-Mamo/Reuters)

Abu Khalil, a 47-year-old Free Syrian Army fighter who is also a visual artist and decorator, carves a tank out of wood at Jabal al-Turkman in Latakia province January 20, 2015. (Photo by Alaa Khweled/Reuters)

Abu Khalil, a 47-year-old Free Syrian Army fighter who is also a visual artist and decorator, poses with his carved wooden airplane at Jabal al-Turkman in Latakia province January 20, 2015. (Photo by Alaa Khweled/Reuters)

Abu Khalil, a 47-year-old Free Syrian Army fighter who is also a visual artist and decorator, carves a tank out of wood at Jabal al-Turkman in Latakia province January 20, 2015. (Photo by Alaa Khweled/Reuters)

Wooden helicopters carved by Abu Khalil, a 47-year-old Free Syrian Army fighter who is also a visual artist and decorator, are displayed at his workshop in Jabal al-Turkman in Latakia province January 20, 2015. (Photo by Alaa Khweled/Reuters)

Barrels filled with fuel are displayed for sale in Aleppo January 13, 2015. (Photo by Nour Kelze/Reuters)

Members of the Syrian Arab Red Crescent push women on wheelchairs at the Karaj al-Hajez crossing, a passageway separating Aleppo's Bustan al-Qasr, which is under rebel control, and Al-Masharqa neighbourhood, an area controlled by forces loyal to Syria's President Bashar al-Assad February 1, 2015. (Photo by Ammar Abdullah/Reuters)

A boy uses remnants of ordnance as he prepares dough inside Abu Khaled's shop in the Douma neighborhood of Damascus April 28, 2015. Abu Khaled opened a shop for making “barley bread” using remnants of weapons including rockets, tank shells and other ordnance fired by forces loyal to Syria's President Bashar al-Assad. (Photo by Amer Almohibany/Reuters)

Abu Khaled, prepares a makeshift grill made from remnants of a rocket inside his shop in the Douma neighborhood of Damascus April 28, 2015. (Photo by Amer Almohibany/Reuters)

A boy uses remnants of ordnance as he prepares dough inside Abu Khaled's shop in the Douma neighborhood of Damascus April 28, 2015. (Photo by Amer Almohibany/Reuters)

Abu Khaled, makes bread on a makeshift grill made from remnants of a rocket inside his shop in the Douma neighborhood of Damascus April 28, 2015. (Photo by Amer Almohibany/Reuters)

Abu Khaled, makes bread on a makeshift grill made from remnants of a rocket inside his shop in the Douma neighborhood of Damascus April 28, 2015. (Photo by Amer Almohibany/Reuters)

Civil defense members pose for a picture after they finished working at a damaged site hit by what activists said was shelling by forces loyal to Syria's President Bashar al-Assad in Aleppo's al-Aryan neighborhood April 30, 2015. (Photo by Hosam Katan/Reuters)

Residents work at a workshop to produce fans and wind turbines in order to generate electricity in the besieged town of Hazeh in the eastern Ghouta of Damascus December 13, 2014. (Photo by Yaseen Al-Bushy/Reuters)

Forty-two-year-old Abu Ali combs sheep skins inside his workshop in Maaret al-Naaman town in Idlib province February 28, 2015. Abu Ali inherited his hundred year old family profession. Having lost his equipment in the country's turmoil, he had to go back to work in primitive ways to produce the wool. (Photo by Khalil Ashawi/Reuters)

A Syrian cobbler repairs a military boot at his shop in Damascus February 9, 2014. (Photo by Khaled al-Hariri/Reuters)

A butcher works outside a shop as people sit near him in Deir al-Zor, eastern Syria December 7, 2013. (Photo by Khalil Ashawi/Reuters)

A woman works at an agriculture field in Aleppo November 8, 2014. (Photo by Hosam Katan/Reuters)

Women sew while working in a garment factory in Idlib city, Syria July 26, 2015. (Photo by Ammar Abdullah/Reuters)

A young boy named Issa carries a mortar shell in a weapons factory of the Free Syrian Army in Aleppo, September 7, 2013. (Photo by Hamid Khatib/Reuters)

A medical laboratory technician views blood samples from patients showing symptoms of leishmaniasis through a microscope at a hospital in Aleppo, February 11, 2013. (Photo by Muzaffar Salman/Reuters)

Employees work at Syria's central bank in the main business district of Damascus April 23, 2013. (Photo by Khaled al-Hariri/Reuters)

A handicapped man buys goods from a grocery shop in Old Aleppo January 15, 2015. (Photo by Hamid Khatib/Reuters)

A man works at a bakery in Aleppo city December 30, 2013. (Photo by Jalal Alhalabi/Reuters)

A man chooses food at a shop in the al-Rawda neighborhood in Damascus April 28, 2013. (Photo by Khaled al-Hariri/Reuters)

A woman carries a child as she walks past a boy selling yogurt along a street in Aleppo's Bab al-Hadeed district December 10, 2014. (Photo by Mahmoud Hebbo/Reuters)

A worker works on prosthetic limbs 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 man works in his kebab shop in Ain Terma neighborhood, Damascus January 23, 2013. (Photo by Goran Tomasevic/Reuters)

A man works inside a factory that manufactures medical gauze in the rebel-controlled area of Hamouriyeh in Damascus suburb April 8, 2015. (Photo by Mohammed Badra/Reuters)

A carpenter works inside his workshop in the old city of Aleppo October 2, 2013. (Photo by Hamid Khatib/Reuters)