Who used Chemical Weapons in Syria ?

The Obama administration will have to "rethink the range of options" available to Washington if chemical weapons have been used by the regime of Bashar al-Assad, the Syrian president.The Pentagon and other security agencies had been told to make preparations for possible action if the "red line" of chemical weapon use had indeed been crossed.

"I've got to make sure I've got the facts. That's what the American people would expect ... If I can establish in a way that not only the United States but also the international community feel confident in the use of chemical weapons by the Assad regime, then that is a game changer," President Obama said.

Syria's UN ambassador Bashar Jaafari told the press on Tuesday that opposition fighters had used "chemical material" during an attack near the city of Idlib.The incident was an attempt to make it look as though government forces had used chemical arms.