Secretary-General Ban Ki-moon said he believes there will be "an overwhelming report" from the UN showing chemical weapons were used in Syria on Aug. 21. (AP)…

Secretary of State John Kerry, left, United Nations-Arab League special envoy for Syria Lakhdar Brahimi and Russian Foreign minister Sergey Lavrov during a press conference at the UN headquarters in Geneva. Photo by Philippe Desmazes/AFP/Getty Images GENEVA -- U.S.

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