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

Some of the destruction at the scene of Friday's car bombing in Beirut. AFP/Getty Images hide caption

itoggle caption AFP/Getty Images

Troops sent to South Sudan by the U.N. watch as men walk to a camp for refugees near Juba, the nation's capital. James Akena /Reuters /Landov hide caption

itoggle caption James Akena /Reuters /Landov

In the northern Syrian city of Aleppo last month, there was a class about how to protect against chemical weapons attacks. J.M. Lopez/AFP/Getty Images hide caption

itoggle caption J.M. Lopez/AFP/Getty Images

At the White House, President Obama and his advisers continue to work to build support in Congress and among allies for striking Syria. Jacquelyn Martin/AP hide caption

itoggle caption Jacquelyn Martin/AP

British Prime Minister David Cameron, who says it is time for the U.N. Security Council "to live up to its responsibilities on Syria." Stefan Wermuth /Reuters /Landov hide caption

itoggle caption Stefan Wermuth /Reuters /Landov

Ammunition was stacked up Saturday in an area near Damascus that is controlled by forces loyal to President Bashar Assad. Khaled al-Hariri /Reuters /Landov hide caption

itoggle caption Khaled al-Hariri /Reuters /Landov

Gas mask in one hand and rifle in the other, a Free Syrian Army fighter sits inside a house in the city of Homs early Thursday. Yazan Homsy /Reuters /Landov hide caption

itoggle caption Yazan Homsy /Reuters /Landov

Secretary of State John Kerry using his head Tuesday in Kabul, where he met the captain of that nation's women's soccer team. Jason Reed/Reuters /Landov hide caption

itoggle caption Jason Reed/Reuters /Landov

Hospital Corpsman Shannon Crowley, with a Marine Corps. Female Engagement Team, in Musa Qala, Afghanistan, in November 2010. Paula Bronstein/Getty Images hide caption

itoggle caption Paula Bronstein/Getty Images

Prince Harry, known when on duty as "Capt. Wales," in the cockpit of an Apache helicopter while he was in Afghanistan last month. John Stillwell/PA wire/pool/EPA /Landov hide caption

itoggle caption John Stillwell/PA wire/pool/EPA /Landov