A member of the Free Syrian Army sits on a sofa in the middle of a debris-strewn street
in Deir al-Zor, Syria, on April , .
Damaged buildings in Jouret al-Shayah, Homs, Syria, on February
People walking down a street are pictured through a hole in a building in Deir al-Zor, on April ,
A Syrian opposition fighter rubs dust from his face in the Jabilleh neighborhood of the eastern city of
Deir al-Zor, during clashes with regime forces as they try to retake the area on February
Zac Baillie/AFP/Getty Images
A resident inspects the damages at an ancient Souk caused by what activists said was shelling by forces loyal
to Syria's President Bashar al-Assad in Deir al-Zor, on March , .
A woman wearing a scarf depicting the Syrian opposition flag walks in the damaged areas in Deir al-Zor
on March .
A group of Syrian Free Army activists inspect a damaged mosque at the Sheikh Yassine district area in the eastern
city of Deir al-Zor on February (
People walk on a street lined with buildings damaged by what activists said were missiles fired by a Syrian Air Force
fighter jet loyal to President Bashar al-Assad in Deir Al-Zor, on March
A burning tank is in Daraa, on March (
Reuters/Ali Abu-Salah/Shaam News Network
People inspect damaged areas in Deir al-Zor, on March
A Syrian street vendor who sells cigarette boxes, sits in front of destroyed shops which were damaged by the shelling of the Syrian
forces, at Maarat al-Nuaman town, in Idlib province, on February
. Syrian rebels battled government troops near a landmark
th century mosque in the northern city of Aleppo on Tuesday, while fierce clashes raged around a police academy west of the city,
activists said (AP Photo/Hussein Malla
Vehicles burn near a crater on a road after an explosion in central Damascus, on February .
Syrian state media blamed what it said was a suicide bombing on "terrorists" battling President
Bashar al-Assad. Reuters/SANA
from burned cars In this photo released by the Syrian official news agency SANA, injured Syrians sit on the
ground while flames and smoke rise after a huge explosion that shook Damascus, on February .
A view of a damaged building in Houla, near Homs, on March
Reuters/Maysara Al-Masri/Shaam News
A boy holds a bicycle near debris and damaged buildings in Homs, on March
Destroyed buildings and streets filled with debris in Homs, on February
Damaged cars are piled up, used as cover from snipers in the Khaldiyeh area of Homs, on February
(Reuters/ Yazan Homsy
A boy takes a picture of his friend who gestures from the top of a damaged building in Deir alZor, on April 4, 2013
A mirror stands inside an old damaged house in Homs, on March
. Reuters/Yazen Homsy
Destroyed buildings along streets filled with debris in Homs, on February .
Tellawi/Shaam News Network
A view of damaged buildings on Abu al-Hol street, Homs, on February ,
. Reuters/Yazen Homsy
of Nihal, in the entrance of an underground Roman tomb used as shelter from Syrian government
forces shelling and airstrikes, at Jabal al-Zaweya, in Idlib province,on February
Across northern Syria, rebels, soldiers, and civilians are making use of the country's wealth of
ancient and medieval antiquities to protect themselves from Syria's two-year-old war. (AP Photo/Hussein Malla
of ) Sami center) speaks with his children in an underground Roman tomb which he uses with his family as shelter from
Syrian government forces, at Jabal al-Zaweya, in Idlib province, on February
The ancient sites are built of thick stone that has already withstood centuries, and are often located in strategi
locations overlooking towns and roads (AP Photo/Hussein Malla
Sobhi al-Hamod, , lives with his family in an underground cave used for shelter from Syrian
government forces in Idlib province, on February .
AP Photo/Hussein Malla
A painting of Syria's President Bashar al-Assad riddled with bullet holes, on the facade of the police
academy in Aleppo, after it was captured by Free Syrian Army fighters, on March
Firefighters attempt to extinguish a fire at a factory after what activists say was shellingby forces loyal to Syria's
President Bashar al-Assad at al-Haidariah area in Aleppo, on February (
An excavator is used to search for casualties under the rubble at a site hit by what activists said was a Scud missile in Aleppo's Ard
al-Hamra neighborhood, on February , .
Rockets struck eastern districts of Aleppo, Syria's biggest city, killing at least
people and trapping a family of
in the ruins of their home,activists in the city said (Reuters/Muzaffar Salman
A damaged car in rubble in Al-Ansari neighborhood after what activists said was a missile attack
by Syrian Air Forces in Aleppo, on February .
Inside a damaged mosque in Aleppo, on March
A Syrian woman sits on the ruins of her house which was destroyed in an airstrike by
government warplanes a few days earlier, killing
members of her family
in the neighborhood of Ansari, Aleppo, on February
AP Photo/Abdullah al-Yassin
The wreckage of a helicopter, belonging to forces loyal to Syrian President Bashar al-Assad
near Menagh military airport in Aleppo, on March ,
. Reuters/Mahmoud Hassano
Burned and damaged buildings in the Sheikh Maksoud area of Aleppo
on April .
Damaged buildings after air force shelling in the Karam Al-Tarrab neighborhood near
Aleppo International Airport,on February .
Reuters/Malek Al Shemali
A Syrian rebel takes position behind a makeshift barricade during clashes with regime
forces in the Salaheddine district of Aleppo, on March
JM Lopez/AFP/Getty Images
In this Tuesday March , ,
citizen journalism image provided by Aleppo Media Center AMC which has been
authenticated based on itscontents and other AP reporting,black smoke rises from buildings due to government
forces shelling, in Aleppo.AP Photo/Aleppo Media Center, AMC
Damaged buildings in the Jdeideh district of Aleppo, on February
A Syrian man fumigates a street covered with uncollected garbage in the northern city
of Aleppo, on March
Bulent Kilic/AFP/Getty Images
A child stands on the remnants of a destroyed military vehicle in front of a damaged
building in Al Inzarat district of Aleppo, on February .