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    New report pins chemical attack on Assad

    Al Jazeera English

    by Al Jazeera English

    Western intelligence agencies say they are convinced beyond reasonable doubt that President Bashar al-Assad's government carried out the worst chemical weapons attack for decades.

    A new report on the gas attack in Syria last month says the amount of toxic material used was bigger than first thought.

    Researchers in the US say a study of photos from the incident seem to show rockets carried fifty times more nerve agent.

    Al Jazeera's James Bays reports from Massachusetts.