The Syrian regime is facing more allegations that it's used chemical weapons in its ongoing civil war. A top Israeli intelligence official on Tuesday cited photographs of victims as evidence of sarin gas. But the Obama administration says it's looking for more "conclusive evidence" before deciding to take action. Fore more, Robert Siegel talks with Susan Glasser, editor in chief of Foreign Policy Magazine, and Charles Blair, Senior Fellow for State and Non-State Threats at the Federation of American Scientists.
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