Four Russian intelligence officers who had entered the Netherlands under diplomatic passports were escorted out of the country after they were found to be carrying out a cyberattack on the OPCW chemical weapons watchdog. Dutch Defense Ministry hide caption
A team samples the impact site of a cylinder that contained chlorine gas, which was dropped on a field in the rebel-held Syrian city of Saraqeb on Feb. 4. OPCW hide caption
A man walks down a street in war-torn Douma on April 20, days after the suspected chemical attack. Louai Beshara/AFP/Getty Images hide caption
Syrian state media said Tuesday that inspectors with the Organisation for the Prohibition of Chemical Weapons had entered the town of Douma. A day later, the OPCW said that hadn't happened. Louai Beshara/AFP/Getty Images hide caption
Representative of the Organisation for the Prohibition of Chemical Weapons met Monday about Syria's alleged use of chemical weapons in Douma. Peter Dejong/AP hide caption
A photo released by the Syrian official news agency SANA Thursday shows an international expert working at a chemical weapons plant in Syria. Destroying the weapons safely may require them to be moved to another country, experts say. AP hide caption
U.N. chemical weapons experts carry samples collected on Aug. 28 from a site of an alleged chemical weapons attack near the Syrian capital Damascus. The Organization for the Prohibition of Chemical Weapons, which is dismantling Syria's chemical weapons stockpile, was awarded the 2013 Nobel Peace Prize on Friday. Reuters /Landov hide caption