A man looks at an unexploded barrel bomb that landed in a cemetery after being dropped by forces loyal to Syria's President Bashar Assad in the northern Syrian city of Aleppo on Thursday. Reuters/Landov hide caption

itoggle caption Reuters/Landov

A Syrian refugee boy stands outside his tent at Al Zaatri refugee camp in the Jordanian city of Mafraq, near the border with Syria, earlier this week. Muhammad Hamed/Reuters/Landov hide caption

itoggle caption Muhammad Hamed/Reuters/Landov

A North Korean KN-08 intercontinental ballistic missile rolls past in a military parade in Pyongyang in July to mark the 60th anniversary of the Korean War armistice. A team of U.S. researchers recently found the buildings where the North Korean military is believed to be assembling the launchers. David Guttenfelder/AP hide caption

itoggle caption David Guttenfelder/AP

Many shops in this area of Beirut, Lebanon, known as the Dahiyeh, are now lined with sandbags to shield them against possible bombings. Tim Fitzsimons for NPR hide caption

itoggle caption Tim Fitzsimons for NPR

Two men, who were among about 80 civilians evacuated on Friday, look out from a bus in the Syrian city of Homs. EPA/Landov hide caption

itoggle caption EPA/Landov

In January, this Free Syrian Army fighter stood in front of graffiti in Aleppo that read, roughly, "down with the Islamic State of Iraq and the Levant." On Monday, al-Qaida's leadership said it has no ties with that jihadist group. Jalal Alhalabi /Reuters/Landov hide caption

itoggle caption Jalal Alhalabi /Reuters/Landov

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