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Chemical weapons

Two cylinders that were dropped on the rebel-held Syrian city of Saraqeb in February — sending nearly a dozen people to seek medical help for nausea and other symptoms — had contained chlorine, according to the Organization for the Prohibition of Chemical Weapons.

After a visit to the site, the OPCW says, its fact-finding mission has confirmed "that chlorine was likely used as a chemical weapon" on Feb. 4 in Saraqeb, a small city that's about 12 miles southeast of Idlib. It also used evidence that was gathered by several nongovernmental organizations.

International inspectors today visited three sites linked to Syria's chemical weapons program. The inspectors are to visit more than 20 sites around the country as part of a mission to destroy the country's stockpile.

But how can this be done while a civil war rages around them?