The OPCW inspectors were investigating recent claims that the Syrian regime used chlorine gas on a rebel-held town. Although the chemical is not outright banned, its use in weapons is.
Syria claims safety concerns, but critics of the chemical weapons deal say President Assad is feeling empowered – and may be stockpiling weapons in a regime stronghold.
A multilateral effort to destroy the Syrian government's chemical arsenal cleared its first hurdle after missing year-end deadline.
International chemical weapons inspectors declared Syria's production facilities destroyed, but the task of disposing of large stockpiles remains.