A Syrian man jumps over barbed wire as he tries to cross the border from the Syrian town of Ras al-Ain to the Turkish border town of Ceylanpinar,
Sanliurfa province, December 6, 2012. REUTERS/Laszlo Balogh
A Syrian army tank is seen in the Suleiman al-Halabi neighborhood, after clashes between Free Syrian Army fighters and regime forces in Aleppo city, October 5, 2012.
REUTERS/George Ourfalian
A Syrian Air Force fighter jet launches missiles at El Edaa district in Syria's northwestern city of Aleppo, September 1, 2012.
REUTERS/Youssef Boudlal
Members of the Free Syrian Army take up a position during a truce on the top of a hilly mountain in the Kurdish area of al-Qaftal, overlooking the town of Azaz, October 31, 2012.
REUTERS/Asmaa Waguih
Free Syrian Army fighters fire a rocket towards a castle where pro-government forces are based, in Harem town, Idlib Governorate, October 28, 2012.
REUTERS/Asmaa Waguih
Syrian Air Force helicopters used by forces loyal to Syria's President Bashar al-Assad are seen at a military base near Idlib, October 27, 2012.
REUTERS/Redwan Al-Homsi/Shaam News Network/Handout
A wounded Syrian man lies on a boat as he is transported to Turkey across the Orontes river on the Turkish-Syrian border
near the village of Hacipasa in Hatay province, October 10, 2012. REUTERS/Osman Orsal
Members of the free Syrian Army use a catapult to launch a homemade bomb during clashes with pro-government soldiers in the city of Aleppo, October, 15, 2012.
REUTERS/Asmaa Waguih
Smoke rises after a Syrian Air Force fighter jet launched missiles at El Edaa district in Syria's northwestern city of Aleppo, September 4, 2012.
REUTERS/Youssef Boudlal
Free Syrian Army fighters sleep inside an occupied room at El Edaa district in Syria's northwestern city of Aleppo, September 5, 2012.
REUTERS/Youssef Boudlal
Civilians and members of the Free Syrian Army try to pull out a body from under the rubble of a building destroyed by a jet air strike in
al-Kalaseh neighbourhood in Aleppo, September 19, 2012. REUTERS/Zain Karam
A Free Syrian Army fighter screams in pain after he was injured in his leg by shrapnel from a shell fired from a Syrian Army tank
in the Salaheddine neighbourhood of central Aleppo, August 7, 2012. REUTERS/Goran Tomasevic
A civilian's body lies on a street in Aleppo's district of al-Midan after being shot by a sniper loyal to
Syria's President Bashar al-Assad, September 26, 2012. REUTERS/Zain Karam
Residents and medics transport a Syrian Army soldier, wounded in what they said was a chemical weapon attack near Aleppo, to a hospital March 19, 2013. Syria's government and rebels accused each other of firing a rocket loaded with chemical agents outside the northern city of Aleppo on Tuesday, an attack which a cabinet minister said killed 16 people and wounded 86. REUTERS/George Ourfalian