Rubble litters the street in the main souk or market area of Maraat al-Numan, Syria. John Cantlie /AFP/Getty Images hide caption
Anti-Assad fighters stood atop a captured army tank on Wednesday in the village of Anadan, about 4 miles northwest of Aleppo. Ahmad Gharabli /AFP/Getty Images hide caption
Video taken from Syrian TV purportedly shows government forces taking up position during clashes with rebels Wednesday in the Al-Midan district of Damascus. AFP/Getty Images hide caption
Saturday: In this picture provided by the Syrian opposition's Shaam News Network, people watch the mass burial of victims from Friday's violence in Houla. AFP/Getty Images hide caption
Syrian refugee children looked out of a bus last week after they arrived at a camp in Turkey. Bulent Kilic /AFP/Getty Images hide caption
At a refugee camp in Reyhanli, Turkey, on Monday, Syrians sought help and safety. Germano Assad/AP hide caption
Syrian mourners on Wednesday carried the body of a man who was killed in fighting near Homs. Gianluigi Guercia /AFP/Getty Images hide caption