A U.N. chemical weapons expert gathers evidence at one of the sites of an alleged poison gas attack in the southwestern Damascus suburb of Mouadamiya August 26, 2013. The United Nations said on Monday it was still possible for the U.N. team of chemical weapons experts to gather evidence necessary to investigate last week's alleged gas attack despite the lapse of time. REUTERS/Ahmad Alshami (SYRIA - Tags: POLITICS CONFLICT HEALTH) - RTX12X7W


© Stringer . / Reuters

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