Syrian

Residents receive food aid at the besieged al-Yarmouk camp, south of Damascus, March 18, 2014, in this handout released by Syria's national news agency SANA. REUTERS/SANA/Handout via Reuters

Sana/Reuters

Residents receive food aid at the besieged al-Yarmouk camp, south of Damascus in this handout released by Syria‘s national news agency SANA. Read more

A Syrian man evacuates a child found in ...A Syrian man evacuates a child found in the rubble of a building reportedly hit by an explosives-filled barrel dropped by a government forces helicopter on March 18, 2014 in Aleppo. Iran's foreign minister that Tehran is "ready to help any logical attempts" to end the Syrian conflict, during a visit by UN-Arab League envoy to Syria Lakhdar Brahimi. AFP PHOTO/KHALED KHATIBKHALED KHATIB/AFP/Getty Images

Khaled Khatib/AFP

A Syrian man evacuates a child found in the rubble of a building reportedly hit by an explosives-filled barrel dropped by a government forces helicopter in Aleppo. Iran’s foreign minister that Tehran is “ready to help any logical attempts” to end the Syrian conflict, during a visit by UN-Arab League envoy to Syria Lakhdar Brahimi.

Syrian emergency personnel extinguish a ...Syrian emergency personnel extinguish a fire following a reported air strike by Syrian government forces on March 7, 2014 during the Friday prayer in the Sukkari neighborhood of the northern city of Aleppo. More than 140,000 people have been killed in Syria since the start of a March 2011 uprising against the Assad family's 40-year rule. AFP PHOTO / BARAA AL-HALABI BARAA AL-HALABI/AFP/Getty Images

Baraa Al-Halabi/AFP

An emergency worker attempts to extinguish a fire following a reported air strike by Syrian government forces on Friday during prayers in the Sukkari neighbourhood of the northern city of Aleppo. More than 140,000 people have been killed in Syria since the start of the March 2011 uprising against the Assad family’s 40-year rule. Read more

A Syrian refugee woman looks out from a window with no glass, in a house in the Kucukpazar area of Istanbul, on March  4, 2014. Syrian government forces are waging a campaign of siege warfare and starvation against civilians as part of its military strategy, a UN-mandated probe said on March 5. Syria's war has since March 2011 killed more than 140,000 people and forced millions more to flee.

Gurcan Ozturk/AFP

A Syrian refugee woman looks out from a window with no glass, in a house in the Kucukpazar area of Istanbul. Syrian government forces are waging a campaign of siege warfare and starvation against civilians as part of its military strategy, a UN-mandated probe said on Wednesday.

A man and three boys, covered with dust,...A man and three boys, covered with dust, sit in a state of shock following a reported air strike attack by government forces on the Hanano district of the northern Syrian city of Aleppo on February 14, 2014. Syria's warring sides began what was expected to be a decisive final day of talks in Geneva, amid warnings that they must at least agree an agenda to save the process.   AFP PHOTO/ALEPPO MEDIA CENTRE/FADI AL-HALABIFadi al-Halabi/AFP/Getty Images

Fadi al-Halabi/AFP

A man and three boys, covered with dust, sit in a state of shock following a reported air strike attack by government forces on the Hanano district of the northern Syrian city of Aleppo. Read more

A Syrian girl attends classes at a make-...A Syrian girl attends classes at a make-shift school in the largest Bulgarian camp in the town of Harmanli on January 21, 2014. Tonnes of humanitarian aid -- including clothes, food and hygiene materials -- has started trickling in from non-governmental groups in the country and abroad to the camps in EU's poorest country after the UN raised alarm over a "human emergency" on the EU's southern fringe.     AFP PHOTO / DIMITAR DILKOFFDIMITAR DILKOFF/AFP/Getty Images

Dimitar Dilkoff/AFP

A Syrian girl attends classes at a makeshift school in the largest Bulgarian camp in the southern town of Harmanli. Humanitarian aid, including clothes, food and hygiene materials, has started trickling in from non-governmental groups in the country and abroad to the camps in the EU’s poorest country after the UN expressed alarm over a ‘human emergency’ on the EU’s southern fringe. Read more

A Free Syrian Army fighter takes up position inside a room in Aleppo...A Free Syrian Army fighter takes up position inside a room as he aims his weapon behind sandbags in the old city of Aleppo November 29, 2013. REUTERS/Mahmoud Hebbo

Mahmoud Hebbo/Reuters

A Free Syrian Army fighter, surrounded by sandbags, takes up position as he aims his weapon into the old city of Aleppo, Syria

In this Sunday, Sept. 22, 2013 photo, Syrian internally displaced children gather outside their temporary home at an abandoned land where they have taken shelter after fleeing their village that turned into a battlefield between government forces and Free Syrian Army fighters in Idlib province, northern Syria. Arabic on the wall reads, "hell of the revolutionaries or Bashar's heaven." (AP Photo)

AP

Syrian internally displaced children gather outside their temporary home at an abandoned land where they have taken shelter after fleeing their village that turned into a battlefield between government forces and Free Syrian Army fighters in Idlib province, northern Syria. Arabic on the wall reads, “hell of the revolutionaries or Bashar’s heaven.” Read more

Free Syrian Army fighters sit on a sofa inside a house in Deir al-Zor...Free Syrian Army fighters sit on a sofa inside a house in Deir al-Zor August 27, 2013.

Khalil Ashawi /Reuters

Free Syrian Army fighters rest inside a house during a rare light moment in Deir al-Zor, SyriaRead more

A Free Syrian Army fighter uses a mirror to monitor the movements of the forces loyal to Syria's President Bashar al-Assad in Aleppo's Qastal al-Harami neighborhood...A Free Syrian Army fighter uses a mirror to monitor the movements of the forces loyal to Syria's President Bashar al-Assad in Aleppo's Qastal al-Harami neighborhood August 8, 2013

Nour Kelze/Reuters

A Free Syrian Army fighter uses a mirror to monitor the movements of the forces loyal to Syria’s President Bashar al-Assad in Aleppo’s Qastal al-Harami neighbourhood