A U.N. chemical weapons expert, wearing a gas mask, holds a plastic bag containing samples from one of the sites of an alleged chemical weapons attack in the Ain Tarma neighbourhood of Damascus August 29, 2013. A team of U.N. experts left their Damascus hotel for a third day of on-site investigations into apparent chemical weapons attacks on the outskirts of the capital. Activists and doctors in rebel-held areas said the six-car U.N. convoy was scheduled to visit the scene of strikes in the eastern Ghouta suburbs. REUTERS/Mohamed Abdullah (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT TPX IMAGES OF THE DAY)
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