The Battle for Syria

Reporter Ghaith Abdul-Ahad journeys to the heart of the insurgency, with rebels that are waging a full-scale assault on the forces of President Bashar al-Assad in the streets of Syria's largest city. Within "liberated zones" near the city of Aleppo, the rebels not only fight the Syrian Army, but struggle against each other. Then, FRONTLINE examines how the president is holding on to power.