A Syrian man, injured and covered in dust, stands in a street of the northern Syrian city of Aleppo after an alleged air strike by Syrian government forces on January 29, 2014. Syrian government forces dropped barrel bombs on rebel-held districts of Aleppo, killing at least 13 people as they pressed an assault southeast of the northern city, the Syrian Observatory for Human Rights said. TOPSHOTS/AFP PHOTO / MOHAMMED AL-KHATIEB