Men and a civil defence member inspect damage after an airstrike in the rebel-held town of Turmanin, in Idlib Governorate near the Syrian-Turkish border, Syria April 6, 2016. (Photo by Ammar Abdullah/Reuters)





Men tend to an injured cow after an airstrike in the rebel-held town of Turmanin, in Idlib Governorate near the Syrian-Turkish border, Syria April 6, 2016. (Photo by Ammar Abdullah/Reuters)





Children play near barricades in a street, which serve as protection from snipers loyal to Syria's President Bashar al-Assad, in Aleppo's rebel-controlled Bustan al-Qasr neighbourhood, Syria April 6, 2016. (Photo by Abdalrhman Ismail/Reuters)





Civilians walk near upright buses barricading a street, which serve as protection from snipers loyal to Syria's President Bashar al-Assad, in Aleppo's rebel-controlled Bustan al-Qasr neighbourhood, Syria April 6, 2016. (Photo by Abdalrhman Ismail/Reuters)





Children play table football in Aleppo's Bustan al-Qasr neighborhood, Syria April 6, 2016. (Photo by Abdalrhman Ismail/Reuters)





Children play near a bus barricading a street, which serves as protection from snipers loyal to Syria's President Bashar al-Assad, in Aleppo's rebel-controlled Bustan al-Qasr neighbourhood, Syria April 6, 2016. (Photo by Abdalrhman Ismail/Reuters)





Civilians walk near upright buses barricading a street, which serve as protection from snipers loyal to Syria's President Bashar al-Assad, in Aleppo's rebel-controlled Bustan al-Qasr neighbourhood, Syria April 6, 2016. (Photo by Abdalrhman Ismail/Reuters)





Children play near upright buses barricading a street, which serve as protection from snipers loyal to Syria's President Bashar al-Assad, in Aleppo's rebel-controlled Bustan al-Qasr neighbourhood, Syria April 6, 2016. (Photo by Abdalrhman Ismail/Reuters)





Women walk near displayed produce in a vegetable market in Aleppo's rebel-controlled Bustan al-Qasr neighbourhood, Syria April 6, 2016. (Photo by Abdalrhman Ismail/Reuters)





Women react to damage as they visit the city of Palmyra, Syria April 9, 2016. (Photo by Omar Sanadiki/Reuters)





Residents carry belongings they collected from their damaged homes as they walk during a return visit to the city of Palmyra, Syria April 9, 2016. (Photo by Omar Sanadiki/Reuters)





A man holds bags of belongings he collected from his damaged house during his visit to the city of Palmyra, Syria April 9, 2016. (Photo by Omar Sanadiki/Reuters)





People carry belongings they collected from their damaged houses as they walk near Syrian army soldiers during their visit to the city of Palmyra, Syria April 9, 2016. (Photo by Omar Sanadiki/Reuters)





Women carry belongings they collected from their damaged houses as they get into into a bus after their visit to the city of Palmyra, Syria April 9, 2016. (Photo by Omar Sanadiki/Reuters)





A woman walks near an Islamic State riddled school wall during her visit to the city of Palmyra, Syria April 9, 2016. The text on the sign (R) reads in Arabic: “Aisha, daughter of Abi Bakir school” and on the left is an islamic quote. (Photo by Omar Sanadiki/Reuters)





A man smokes a cigarette inside his damaged home during his visit to the city of Palmyra, Syria April 9, 2016. (Photo by Omar Sanadiki/Reuters)





Residents inspect damages after an airstrike on the rebel held al-Maysar neighborhood in Aleppo, Syria, April 11, 2016. (Photo by Abdalrhman Ismail/Reuters)





A man removes debris after an airstrike on the rebel held al-Maysar neighborhood in Aleppo, Syria, April 11, 2016. (Photo by Abdalrhman Ismail/Reuters)





Syrian rescue workers and residents help an injured woman following a reported air strike by government forces on the rebel-held neighbourhood of Haydariya in the northern city of Aleppo on April 10, 2016. (Photo by Thaer Mohammed/AFP Photo)