Secretary of State John Kerry today laid out the evidence linking Syria's Assad Regime to a chemical weapons attack on civilians and the case for US action against Syria. In a forceful speech at the State Department this morning, Kerry said, "So the primary question is really no longer: What do we know? The question is: What are we – we collectively – what are we in the world going to do about it?" What will the US do next? We listen to that argument and the reaction.