A man reacts at a site hit by what activists said was an air strike by forces loyal to Syria's President Bashar al-Assad in al-Shaar neighbourhood of Aleppo
A man reacts at a site hit by what activists said was an air strike by forces loyal to Syria's President Bashar al-Assad in al-Shaar neighbourhood of Aleppo June 2, 2014. REUTERS/Nour Kelze (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
Members of the Civil Defence search for survivors and casualties under the rubble after what activists said was an air strike in al-Shaar neighbourhood of Aleppo
Members of the Civil Defence search for survivors and casualties under the rubble after what activists said was an air strike by forces loyal to Syria's President Bashar al-Assad in al-Shaar neighbourhood of Aleppo June 2, 2014. REUTERS/Nour Kelze (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
A child reacts to the camera at a warehouse as the Syrian Red Crescent unload humanitarian aids in eastern al-Ghouta, near Damascus
A child reacts to the camera at a warehouse as the Syrian Red Crescent unload humanitarian aids in eastern al-Ghouta, near Damascus June 2, 2014. Picture taken June 2, 2014. REUTERS/Bassam Khabieh
A man holds a boy who survived what activists said was an air strike by forces loyal to Syria's President Assad in al-Shaar neighbourhood of Aleppo
A man holds a boy who survived what activists said was an air strike by forces loyal to Syria's President Bashar al-Assad in al-Shaar neighbourhood of Aleppo June 2, 2014. REUTERS/Sultan Kitaz (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
A girl stands on rubble as she looks at the damage at a site hit by what activists said was an air strike by forces loyal to Syria's President Assad in al-Shaar neighbourhood of Aleppo
A girl stands on rubble as she looks at the damage at a site hit by what activists said was an air strike by forces loyal to Syria's President Bashar al-Assad in al-Shaar neighbourhood of Aleppo June 2, 2014. REUTERS/Sultan Kitaz (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
Members of the Civil Defence rescue children after what activists said was an air strike by forces loyal to Syria's President Assad in al-Shaar neighbourhood of Aleppo
Members of the Civil Defence rescue children after what activists said was an air strike by forces loyal to Syria's President Bashar al-Assad in al-Shaar neighbourhood of Aleppo June 2, 2014. REUTERS/Sultan Kitaz (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT TPX IMAGES OF THE DAY)
A member of the Civil Defence helps a wounded civilian after what activists said was an air strike by forces loyal to Syria's President Assad in al-Shaar neighbourhood of Aleppo
A member of the Civil Defence helps a wounded civilian after what activists said was an air strike by forces loyal to Syria's President Bashar al-Assad in al-Shaar neighbourhood of Aleppo June 2, 2014. REUTERS/Sultan Kitaz (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT TPX IMAGES OF THE DAY)
A wheat field is seen in Arbeen, in the eastern Damascus suburb of Ghouta
A wheat field is seen in Arbeen, in the eastern Damascus suburb of Ghouta May 31, 2014. War and drought have cut Syria's wheat forecast to between 1 million and 1.7 million tonnes, agricultural experts and traders say. Before the conflict, it typically produced around 3.5 million tonnes a year. Picture taken May 31, 2014. REUTERS/Diaa Al-Din (SYRIA - Tags: POLITICS CONFLICT CIVIL UNREST FOOD AGRICULTURE BUSINESS COMMODITIES)
Farmers harvest wheat in Arbeen
Farmers harvest wheat in Arbeen, in the eastern Damascus suburb of Ghouta June 1, 2014. War and drought have cut Syria's wheat forecast to between 1 million and 1.7 million tonnes, agricultural experts and traders say. Before the conflict, it typically produced around 3.5 million tonnes a year. Picture taken June 1, 2014. REUTERS/Diaa Al-Din (SYRIA - Tags: POLITICS CONFLICT FOOD AGRICULTURE CIVIL UNREST BUSINESS COMMODITIES)
A farmer uses a threshing machine as he harvests wheat crop in Arbeen, in the eastern Damascus suburb of Ghouta
A farmer uses a threshing machine as he harvests wheat crop in Arbeen, in the eastern Damascus suburb of Ghouta June 1, 2014. War and drought have cut Syria's wheat forecast to between 1 million and 1.7 million tonnes, agricultural experts and traders say. Before the conflict, it typically produced around 3.5 million tonnes a year. Picture taken June 1, 2014. REUTERS/Diaa Al-Din (SYRIA - Tags: POLITICS CONFLICT FOOD AGRICULTURE CIVIL UNREST BUSINESS COMMODITIES)