Richard Haass, the president on the Council on Foreign Relations, said Monday he was almost certain the United States was going to attack Syria.

"Secretary Kerry went far out on a limb, both in the content and, as you say, the tone," he told CNN. "So, sure, I would frankly be surprised and then some if the United States now did not probably together with a few other countries take some military action."

Secretary of State John Kerry has accused Bashar al-Assad’s regime of carrying out "a moral obscenity" for allegedly using chemical weapons against civilians. Kerry said such actions were "inexcusable" and that Syria would be held accountable.

"You're probably looking at sea launch cruise missile, probably some airborne cruise missiles, but something along those lines I think would be the most natural sort of response for the United States to launch at this point," Haass said.

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