process, through our commitment to the ultimate negotiated settlement that will have to take place, there is no future for assad in that governance. but this military operation is specifically geared to prevent a future chemical attack and to deter and to degrade the assad capacity to be able to do that. now let me be clear. whatever the president ultimately decides to do in that context i assure you assad will feel its impact and they will know that something has happened. >> before i let you go, how can americans feel confident that america's first strike against syria in this civil war will be its last? >> david, that will depend on whether assad decides to use chemical weapons or not. the president of the united states does not intend to and does not want to see the united states assume responsibility for syria's civil war. that is not what he is setting out to do.