Free Syrian Army fighters take positions as one of them points his weapon through a hole in a wall in Aleppo's Saif al-Dawla district March 20, 2013.
REUTERS/Giath Taha
Civilians search for casualties inside a building, which activists said was damaged after it came under fire by a Syrian Air Force fighter jet loyal to
Syria's President Bashar al-Assad, in Kefr Hamra area, north of Aleppo March 19, 2013. REUTERS/Giath Taha
A tank belonging to forces loyal to Syria's President Bashar al-Assad is set on fire during what activists said were clashes between government forces and the Free Syrian Army,
in the main south highway near Damascus, March 19, 2013. REUTERS/Mohammed Dimashkia
Free Syrian army fighters carry Joseph, a 19-year-old fighter of the Aoun-bi-allah Brigade which operates under the Free Syrian Army,
in a blanket after a sniper shot him in his abdomen in Aleppo March 16, 2013. REUTERS/Giath Taha
A man tries to extinguish a fire following shelling by forces loyal to Syria's President Bashar al-Assad, according to the Free Syrian Army,
in Jobar area in Damascus March 13, 2013. REUTERS/ Mohammed Dimashkia
A boy looks inside the statue of President Bashar Al-Assad's father, Hafez Al-Assad, in Raqqa province, eastern Syria, March 13, 2013.
REUTERS/Hamid Khatib
A mortar that belongs to the Free Syrian Army fighters, is pictured attached to a car to be pulled to the front line where clashes with forces loyal to Syria's President Bashar al-Assad are taking place,
in Binnish in Idlib province March 13, 2013. REUTERS/Mohamed Kaddoor/Shaam News Network/Handout
A man runs amongst rubble as smoke rises from buildings damaged by what activists said were missiles fired by a Syrian Air Force fighter jet loyal to
President Bashar al-Assad in Raqqa province, eastern Syria, March 12, 2013. REUTERS/Hamid Khatib
A Free Syrian Army fighter mourns at the grave of his father who was killed by what activists said was shelling by forces loyal to Syria's President Bashar al-Assad,
in a public park that has been converted into a makeshift graveyard in Deir el-Zor March 11, 2013. REUTERS/Khalil Ashawi
A Free Syrian Army fighter looks back while pointing his weapon at a police academy as smoke rises during fighting between Free Syrian Army fighters and forces loyal to
Syria's President Bashar al-Assad, on the outskirt of Aleppo, March 2, 2013. REUTERS/Sarmad Al-Shamali /Shaam News Network/Handout
Free Syrian Army fighters hold their weapons and take positions in preparation for what they say is an ambush against forces loyal to Syria's President Bashar al-Assad in
Binnish in Idlib Province February 21, 2013. REUTERS/Mohamed Kaddoor/Shaam News Network/Handout
Activists watch a televised broadcast of the Champions League soccer match between Barcelona and AC Milan in a school hall in Aleppo February 20, 2013.
Picture taken February 20, 2013. REUTERS/Muzaffar Salman