Bashar Assad almost certainly crossed a 'red line' by using sarin or some other chemical weapon against his own people, President Obama said in April. The casualty toll from the latest suspected use suggests sarin henceforth will be associated with Syria and Mr. Assad.
The Supreme Court heard a case Tuesday involving the prosecution of a Pennsylvania microbiologist who used toxic chemicals to try to settle a personal score. Federal prosecutors charged the woman with using 'chemical weapons.'
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