A Free Syrian Army fighter holds the hand of his son as they walk along a street in Deir al-Zor, eastern Syria
A Free Syrian Army fighter holds the hand of his son as they walk along a street in Deir al-Zor, eastern Syria February 10, 2014. Picture taken February 10, 2014. REUTERS/Khalil Ashawi (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
Free Syrian Army fighters warm themselves around a fire as they smoke a waterpipe and drink tea inside a room in Deir al-Zor, eastern Syria
Free Syrian Army fighters warm themselves around a fire as they smoke a waterpipe and drink tea inside a room in Deir al-Zor, eastern Syria February 10, 2014. Picture taken February 10, 2014. REUTERS/Khalil Ashawi (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
Free Syrian Army fighters warm themselves around a fire and drink tea as they rest inside a room in Deir al-Zor, eastern Syria
Free Syrian Army fighters warm themselves around a fire and drink tea as they rest inside a room in Deir al-Zor, eastern Syria February 10, 2014. Picture taken February 10, 2014. REUTERS/Khalil Ashawi (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
Syrian envoy says dangerous chemical arms to be removed by March 1
SYRIA-CRISIS/CHEMICAL-DEADLINE (URGENT):Syrian envoy says dangerous chemical arms to be removed by March 1
UN and partners deliver desperately needed aid to besieged Syrian city of Homs
A ''humanitarian pause" in Homs allows the evacuation of hundreds of civilians and some aid deliveries, but convoys and aid workers come under sustained fire.
Debris and damaged buildings line a deserted street near Aleppo's historic citadel
Debris and damaged buildings line a deserted street near Aleppo's historic citadel, which is controlled by forces loyal to Syria's President Bashar al-Assad February 10, 2014. Picture taken February 10, 2014. REUTERS/Ammar Abdullah (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
Debris and damaged buildings line a deserted street near Aleppo's historic citadel
Debris and damaged buildings line a deserted street near Aleppo's historic citadel, which is controlled by forces loyal to Syria's President Bashar al-Assad February 10, 2014. Picture taken February 10, 2014. REUTERS/Ammar Abdullah (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
A Free Syrian Army fighter uses a walkie-talkie as he peeks out from a room in the old city of Aleppo
A Free Syrian Army fighter uses a walkie-talkie as he peeks out from a room in the old city of Aleppo February 10, 2014. Picture taken February 10, 2014. REUTERS/Ammar Abdullah (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)