A Syrian boy herds sheep next to damaged vehicles in Ain Tarma, in the eastern Ghouta area, a rebel stronghold east of the capital Damascus on January 25, 2017. (Photo by Amer Almohibany/AFP Photo)





Rebels drive their vehicles on the outskirts of the northern Syrian town of al-Bab, Syria January 29, 2017. (Photo by Khalil Ashawi/Reuters)





A Turkish vehicle drives on the outskirts of the northern Syrian town of al-Bab, Syria January 29, 2017. (Photo by Khalil Ashawi/Reuters)





A rebel fighter walks with his weapon near fellow fighters on the outskirts of the northern Syrian town of al-Bab, Syria January 29, 2017. (Photo by Khalil Ashawi/Reuters)





Medics tend to the wounds of a rebel fighter that got injured while rebels advance towards the northern Syrian town of al-Bab, on the outskirts of the town, Syria January 29, 2017. (Photo by Khalil Ashawi/Reuters)





Rebels walk near snow on the outskirts of the northern Syrian town of al-Bab, Syria January 29, 2017. (Photo by Khalil Ashawi/Reuters)





Civilians and rebel fighters that were evacuated from the Wadi Barada valley near Damascus, after an agreement reached on Thursday between rebels and Syria's army, arrive riding buses in the rebel controlled Qalaat al-Madiq town in Hama province, Syria January 30, 2017. (Photo by Omar Sanadiki/Reuters)





Civilians and rebel fighters that were evacuated from the Wadi Barada valley near Damascus, after an agreement reached on Thursday between rebels and Syria's army, rest upon arrival in the rebel controlled Qalaat al-Madiq town in Hama province, Syria January 30, 2017. (Photo by Omar Sanadiki/Reuters)





Medics move an injured man that was evacuated from the Wadi Barada valley near Damascus, after an agreement reached on Thursday between rebels and Syria's army, in the rebel controlled Qalaat al-Madiq town in Hama province, Syria January 30, 2017. (Photo by Omar Sanadiki/Reuters)





Civilians and rebel fighters that were evacuated from the Wadi Barada valley near Damascus, after an agreement reached on Thursday between rebels and Syria's army, rest upon arrival in the rebel controlled Qalaat al-Madiq town in Hama province, Syria January 30, 2017. (Photo by Omar Sanadiki/Reuters)





A red crescent member stands near a no-arms sign as people evacuated from the Wadi Barada valley near Damascus, after an agreement reached on Thursday between rebels and Syria's army, arrive in the rebel controlled Qalaat al-Madiq town in Hama province, Syria January 30, 2017. (Photo by Omar Sanadiki/Reuters)





Children play on a swing in a damaged neighbourhood in Aleppo, Syria January 30, 2017. (Photo by Ali Hashisho/Reuters)





A man sells cotton candy near a banner for Syria's president Bashar al-Assad in Aleppo, Syria January 30, 2017. (Photo by Ali Hashisho/Reuters)





A graveyard is seen through a hole in the wall in Aleppo, Syria January 30, 2017. (Photo by Ali Hashisho/Reuters)





A woman carries bread on her head in Aleppo, Syria January 30, 2017. (Photo by Ali Hashisho/Reuters)





A man on crutches walks through a damaged neighbourhood in Aleppo, Syria January 30, 2017. (Photo by Ali Hashisho/Reuters)





A woman carries bread through a damaged street in Aleppo, Syria January 30, 2017. (Photo by Ali Hashisho/Reuters)





A woman stands on a damaged balcony in Aleppo, Syria January 30, 2017. (Photo by Ali Hashisho/Reuters)





Russian soldiers stand near a military vehicle in Aleppo, Syria January 30, 2017. (Photo by Ali Hashisho/Reuters)





Children attend a classroom in Aleppo, Syria January 30, 2017. (Photo by Ali Hashisho/Reuters)





A woman carries bread in Aleppo, Syria January 30, 2017. (Photo by Ali Hashisho/Reuters)





A man with a light on his head, warms himself by a fire inside his damaged shop in Aleppo, Syria January 30, 2017. (Photo by Omar Sanadiki/Reuters)





Russian soldiers walk in the Old City of Aleppo, Syria January 31, 2017. (Photo by Ali Hashisho/Reuters)





Damaged buildings are seen from Aleppo's historic citadel, in the Old City of Aleppo, Syria January 31, 2017. (Photo by Ali Hashisho/Reuters)





People visit Aleppo's historic citadel, in the Old City of Aleppo, Syria January 31, 2017. (Photo by Ali Hashisho/Reuters)





A woman walks inside Aleppo's Umayyad mosque, Syria January 31, 2017. (Photo by Ali Hashisho/Reuters)





People take a selfie inside Aleppo's Umayyad mosque, Syria January 31, 2017. (Photo by Ali Hashisho/Reuters)





A view shows part of Aleppo's Umayyad mosque, Syria January 31, 2017. (Photo by Ali Hashisho/Reuters)





A Syrian army soldier stands guard as visitors walk inside Aleppo's Umayyad mosque, Syria January 31, 2017. (Photo by Omar Sanadiki/Reuters)





A man carries a wooden door to be used for heating in Bab Antakia, in the Old City of Aleppo, Syria January 31, 2017. (Photo by Omar Sanadiki/Reuters)





A damaged vehicle is pictured in Khan al-Wazeer street, in the Old City of Aleppo, Syria January 31, 2017. (Photo by Omar Sanadiki/Reuters)





An artefact is seen outside Aleppo's national museum, Syria January 31, 2017. (Photo by Ali Hashisho/Reuters)





People walk past damaged shops in the Old City of Aleppo, Syria January 31, 2017. (Photo by Ali Hashisho/Reuters)





A Syrian army soldier stands guard as a poster depicting Syria's President Bashar al-Assad is seen in the background in the Old City of Aleppo, Syria January 31, 2017. (Photo by Ali Hashisho/Reuters)





A Syrian Arab Red Crescent (SARC) member passes by a damaged SARC vehicle after an airstrike hit their centre at dawn in the rebel-held Idlib City, Syria February 1, 2017. (Photo by Ammar Abdullah/Reuters)





Rebel fighters gather on the outskirts of the northern Syrian town of al-Bab, Syria February 1, 2017. (Photo by Khalil Ashawi/Reuters)





A rebel fighter prepares his weapon on the outskirts of the northern Syrian town of al-Bab, Syria February 1, 2017. (Photo by Khalil Ashawi/Reuters)





Rebel fighters gather on the outskirts of the northern Syrian town of al-Bab, Syria February 1, 2017. (Photo by Khalil Ashawi/Reuters)





Rebel fighters carry their weapons as they walk on the outskirts of the northern Syrian town of al-Bab, Syria February 1, 2017. (Photo by Khalil Ashawi/Reuters)





Displaced Syrians sit at a shelter in Jibreen, on the outskirts of Aleppo, Syria February 1, 2017. (Photo by Ali Hashisho/Reuters)





People buy bread in Aleppo, Syria February 1, 2017. (Photo by Ali Hashisho/Reuters)





A general view shows Aleppo at dawn, Syria February 2, 2017. (Photo by Ali Hashisho/Reuters)





A street vendor sells fish in Aleppo, Syria February 2, 2017. (Photo by Ali Hashisho/Reuters)





People queue to refill empty gas cylinders in Aleppo, Syria February 2, 2017. (Photo by Ali Hashisho/Reuters)





People walk along a street in Aleppo, Syria February 2, 2017. (Photo by Ali Hashisho/Reuters)





Children ride a donkey cart along a street in Aleppo, Syria February 2, 2017. Pictures of Syria's President Bashar al-Assad are seen in the background. (Photo by Ali Hashisho/Reuters)





Women and children queue to receive free meals in Aleppo, Syria February 2, 2017. (Photo by Ali Hashisho/Reuters)





A woman walks along a damaged street in Aleppo, Syria February 2, 2017. (Photo by Ali Hashisho/Reuters)





Russian soldiers, on armoured vehicles, patrol a street in Aleppo, Syria February 2, 2017. (Photo by Ali Hashisho/Reuters)





Dana, whose leg was amputated due to shelling, waits to be inspected at an International Red Cross center for prosthesis in Aleppo, Syria February 2, 2017. (Photo by Ali Hashisho/Reuters)





Russian soldiers, on armoured vehicles, patrol a street in Aleppo, Syria February 2, 2017. (Photo by Omar Sanadiki/Reuters)





People who fled the violence from Islamic State-controlled northern Syrian town of al-Bab arrive in the rebel-held outskirts of the town, Syria February 3, 2017. (Photo by Khalil Ashawi/Reuters)





A child, who fled with others from Islamic State-controlled northern Syrian town of al-Bab, looks out from a bus upon arrival to the rebel-held outskirts of the town, Syria February 3, 2017. (Photo by Khalil Ashawi/Reuters)





Rebel fighters ride in a convoy on the outskirts of the Islamic State-controlled northern Syrian town of al-Bab, Syria February 3, 2017. (Photo by Khalil Ashawi/Reuters)





Rebel fighters embrace each other on the outskirts of the Islamic State-controlled northern Syrian town of al-Bab, Syria February 3, 2017. (Photo by Khalil Ashawi/Reuters)





A woman, who fled with others the violence from Islamic State-controlled northern Syrian town of al-Bab, arrives with her herd of sheep in the rebel-held outskirts of the town, Syria February 3, 2017. (Photo by Khalil Ashawi/Reuters)





People who fled the violence from Islamic State-controlled northern Syrian town of al-Bab arrive in the rebel-held outskirts of the town, Syria February 3, 2017. (Photo by Khalil Ashawi/Reuters)





People who fled the violence from Islamic State-controlled northern Syrian town of al-Bab arrive in the rebel-held outskirts of the town, Syria February 3, 2017. (Photo by Khalil Ashawi/Reuters)





People who fled the violence from Islamic State-controlled northern Syrian town of al-Bab arrive in the rebel-held outskirts of the town, Syria February 3, 2017. (Photo by Khalil Ashawi/Reuters)





Children, who fled from Islamic State-controlled northern Syrian town of al-Bab, arrive with their family to the rebel-held outskirts of the town, Syria February 3, 2017. (Photo by Khalil Ashawi/Reuters)





A displaced Syrian, fleeing from Deir Ezzor city besieged by Islamic State (IS) group fighters, poses for a picture with the face covered revealing only the eyes in a refugee camp in al- Hawl, located some 14 kilometers from the Iraqi border in Syria’s northeastern Hassakeh province, on February 1, 2017 IS has been fighting fierce battles in Deir Ezzor city, capital of the oil- rich province of the same name which borders Iraq, which the jihadist group has been besieging since early 2015. (Photo by Delil Souleiman/AFP Photo)