The chairman of the United Nations (UN) Commission of Inquiry on Syria, Paulo Pinheiro [Getty Images]

GENEVA, SWITZERLAND - AUGUST 27 : The chairman of the United Nations (UN) Commission of Inquiry on Syria, Paulo Pinheiro, attends a press conference at United Nations offices in Geneva, Switzerland on August 27, 2014. The report said Syrian government forces used chemical weapon on eight different occasions in April and May. (Photo by Murat Unlu/Anadolu Agency/Getty Images)

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