A man, whose relatives are trapped under the rubble, reacts at a site hit by what activists said was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad in Aleppo's Bustan al-Qasr neighborhood
A man, whose relatives are trapped under the rubble, reacts at a site hit by what activists said was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad in Aleppo's Bustan al-Qasr neighborhood May 26, 2014. REUTERS/Hosam Katan (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
Men search for survivors at a site hit by what activists said was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad in Aleppo's Bustan al-Qasr neighborhood
Men search for survivors at a site hit by what activists said was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad in Aleppo's Bustan al-Qasr neighborhood May 26, 2014. REUTERS/Hosam Katan (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
Men search for survivors under the rubble at a site hit by what activists said was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad in Aleppo's Bustan al-Qasr neighborhood
Men search for survivors under the rubble at a site hit by what activists said was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad in Aleppo's Bustan al-Qasr neighborhood May 26, 2014. REUTERS/Hosam Katan (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
Men search for survivors under the rubble at a site hit by what activists said was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad in Aleppo's Bustan al-Qasr neighborhood
Men search for survivors under the rubble at a site hit by what activists said was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad in Aleppo's Bustan al-Qasr neighborhood May 26, 2014. REUTERS/Hosam Katan (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
Rescuers inspect a site hit by what activists said was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad in Aleppo's Bustan al-Qasr neighborhood
Rescuers inspect a site hit by what activists said was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad in Aleppo's Bustan al-Qasr neighborhood May 26, 2014. REUTERS/Hosam Katan (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
Free Syrian Army fighters drink syrup water from a roadside stall before heading towards the frontline in the old city of Aleppo
Free Syrian Army fighters drink syrup water from a roadside stall before heading towards the frontline in the old city of Aleppo May 26, 2014. REUTERS/Abdalrhman Ismail (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY)
Free Syrian Army fighters gather near a rocket launcher in the old city of Aleppo
Free Syrian Army fighters gather near a rocket launcher in the old city of Aleppo May 26, 2014. REUTERS/Abdalrhman Ismail (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY)
A rebel commander gestures during the launching of self-made rockets towards forces loyal to Syria's President Bashar al-Assad who are positioned in the Maysaloun neighbourhood in Aleppo
A rebel commander gestures during the launching of self-made rockets towards forces loyal to Syria's President Bashar al-Assad who are positioned in the Maysaloun neighbourhood in Aleppo May 26, 2014. REUTERS/Abdalrhman Ismail (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY)
Free Syrian Army fighters prepare a self-made rocket before firing it towards forces loyal to Syria's President Bashar al-Assad who are positioned in the Maysaloun neighbourhood in Aleppo
Free Syrian Army fighters prepare a self-made rocket before firing it towards forces loyal to Syria's President Bashar al-Assad who are positioned in the Maysaloun neighbourhood in Aleppo May 26, 2014. REUTERS/Abdalrhman Ismail (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY)
Free Syrian Army fighters carry a self-made rocket before firing it towards forces loyal to Syria's President Bashar al-Assad who are positioned in the Maysaloun neighbourhood in Aleppo
Free Syrian Army fighters carry a self-made rocket before firing it towards forces loyal to Syria's President Bashar al-Assad who are positioned in the Maysaloun neighbourhood in Aleppo May 26, 2014. REUTERS/Abdalrhman Ismail (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY)