Obama warns Syria chemical weapons use may lead to US intervention
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US President Barack Obama has said the use of chemical weapons by Syria would be a "red line" that would change his thinking on intervention in the crisis.
He said he had "at this point not ordered military engagement".
But he added: "There would be enormous consequences if we start seeing movement on the chemical weapons front or the use of chemical weapons."
More here: BBC News - Obama warns Syria chemical weapons use may spark US action