Tens of thousands flee Syria's largest city

In this Sunday, July 29, 2012 photo, Free Syrian Army soldiers are seen at the border town of Azaz, some 20 miles (32 kilometers) north of Aleppo, Syria. The U.N. said 200,000 Syrians have fled the embattled city of Aleppo since intense clashes between regime forces and rebels began 10 days ago. The government forces turned mortars, tank and helicopter gunships against rebel positions on Monday, July 30, 2012. (AP Photo/Turkpix)