Fierce fighting rages for a second straight day in Syria's commercial capital Aleppo as government troops continue an offensive against rebel-held areas of the city. In an interview with AFP, a spokesman for the Free Syrian Army calls on the international community for help in averting a massacre and in preventing the use of chemical weapons. He also says that the rebels will do everything in their power to repel regime forces, warning that Aleppo will become a cemetery for tanks. Duration: 01:11