From Antoine Mariotti, AFP:  US President Barack Obama reiterated on Friday that the use of chemical weapons by the Syrian regime was a “game changer,” but stated that intelligence proving that such weapons had been used was not yet concrete.

“Horrific as it is when mortars are being fired on civilians and people are being indiscriminately killed, to use potential weapons of mass destruction on civilian populations crosses another line with respect to international norms and international law,” Obama told reporters at the White House.

“That is going to be a game changer. We have to act prudently. We have to make these assessments deliberately. But I think all of us … recognise how we cannot stand by and permit the systematic use of chemical weapons on civilian populations,” he said.   (photo: AFP/Getty)

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