In this image taken from video obtained from the Ugarit News, which has been authenticated based on its contents and other AP reporting, Syrian rebels capture a helicopter air base near the capital, Damascus, after fierce fighting on Sunday, Nov. 25, 2012. The takeover claim showed how rebels are advancing in the area of the capital, though they are badly outgunned by President Bashar Assad's forces, making inroads where Mr. Assad's power was once unchallenged. Rebels have also been able to fire mortar rounds into Damascus recently. (AP Photo/Ugarit News via AP video)

Photo by: Uncredited

In this image taken from video obtained from the Ugarit News, which has been authenticated based on its contents and other AP reporting, Syrian rebels capture a helicopter air base near the capital, Damascus, after fierce fighting on Sunday, Nov. 25, 2012. The takeover claim showed how rebels are advancing in the area of the capital, though they are badly outgunned by President Bashar Assad's forces, making inroads where Mr. Assad's power was once unchallenged. Rebels have also been able to fire mortar rounds into Damascus recently. (AP Photo/Ugarit News via AP video)