In this citizen journalism image provided by the United media office of Arbeen which has been authenticated based on its contents and other AP reporting, Syrian rebels escorted the UN investigation ... more 
In this citizen journalism image provided by the United media office of Arbeen which has been authenticated based on its contents and other AP reporting, Syrian rebels escorted the UN investigation team, in Damascus countryside of Zamalka, Syria, Wednesday, Aug. 28, 2013. U.N. chemical weapons experts headed to a Damascus suburb on Wednesday for a new tour of areas struck by a purported poison gas attack, activists said, as Western powers laid the groundwork for a possible punitive strike and the U.N. chief pleaded for more time for diplomacy. (AP Photo/United media office of Arbeen) less 
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Associated Press | Photo By United media office of Arbeen
Wed, Aug 28, 2013 12:27 PM EDT