Russian President Vladimir Putin greets his Syrian counterpart, Bashar Assad, in Moscow on Dec. 19, 2006. Russia --€” along with China and Iran --€” has remained a steadfast ally of Assad amid calls for international intervention in Syria. Mikhail Klimentyev/AP hide caption

itoggle caption Mikhail Klimentyev/AP

A Syrian man protesting an alleged chemical weapons attack in his homeland holds up a placard Wednesday in front of the United Nations offices in Beirut. Hussein Malla/AP hide caption

itoggle caption Hussein Malla/AP

Syrians inspect Saturday the rubble of buildings damaged by government airstrikes in Qusair, Syria. The image was provided by Qusair Lens, and was authenticated based on its contents and other AP reporting. ASSOCIATED AP hide caption

itoggle caption ASSOCIATED AP

Syrian President Bashar Assad speaks at the Opera House in Damascus, Syria, on Jan. 6. In an interview with Britain's Sunday Times, Assad said that only the Syrian people can tell him when to go. SANA/AP hide caption

itoggle caption SANA/AP

Activists in the town of Saraqib, Syria, hold a poster that reads, "Sheikh Moaz al Khatib represents me." Courtesy of Mahmoud Bakkour hide caption

itoggle caption Courtesy of Mahmoud Bakkour