After the Aug. 21 chemical weapons attack near Damascus that reportedly killed more than 1,000 people and has been blamed on Bashar Assad's regime, the Syrian president's ambassador to the U.N. claimed that opposition forces had used such weapons at least three times in the days immediately after.
A satellite cellphone rings for rebel commander Bashar al-Zawi, at home with his family in the Jordanian city of Irbid. It's a rare domestic break for this wealthy businessman turned rebel commander. But he is anxious to get back to his battalion of 5,000 fighters in southern Syria.
They are taking part in a rebel offensive that is squeezing the Syrian army around the city of Dera'a. Military analysts say the fight is one of the most strategically important battles in Syria's civil war, because Dera'a, close to Damascus, is President Bashar Assad's stronghold in the southwest.