Syrian Foreign Minister Walid Moallem (left) at the peace talks in Montreux, Switzerland, on Wednesday. Gary Cameron /Reuters/Landov hide caption

itoggle caption Gary Cameron /Reuters/Landov

Syrian look up after an apparent airstrike by forces loyal to President Bashar Assad on Tuesday in the city of Aleppo. Ammar Abdullah/Reuters /Landov hide caption

itoggle caption Ammar Abdullah/Reuters /Landov

Supporters of Tunisia's secular Popular Front on Tuesday celebrate the third anniversary of the ouster of dictator Zine el-Abidine Ben Ali. The country is on the verge of approving a new constitution that was negotiated by Islamist and secular political parties. Anis Mili/Reuters /Landov hide caption

itoggle caption Anis Mili/Reuters /Landov

Syrian refugees sit by their tent in a camp on the Lebanese border town of Arsal on Dec. 15. Ahmad Shalha /Reuters /Landov hide caption

itoggle caption Ahmad Shalha /Reuters /Landov

U.S. Secretary of State John Kerry speaks during a news conference at the David Citadel Hotel in Jerusalem on Sunday. Brendan Smialowski/AP hide caption

itoggle caption Brendan Smialowski/AP

Burak Karan was a rising German-Turkish soccer player before leaving Germany to fight in the Syrian civil war. He was killed in northern Syria in October at age 26. Karan is shown here in Aachen, Germany, in 2008. Marcel Decoux/EPA/Landov hide caption

itoggle caption Marcel Decoux/EPA/Landov

Norwegian marines patrol the waters around the Norwegian frigate HNOMS Helge Ingstad, which was docked in Cyprus over the weekend. The frigate, and the Danish warship HDMS Esbern Snare, will escort Danish and Norwegian cargo ships transporting Syria's most dangerous chemical weapons. Pavlos Vrionides/AP hide caption

itoggle caption Pavlos Vrionides/AP