col. bacevich, what's your view?if indeed some people suggest this is a one-off event, i think in a week we won't be talking abut it. if this aye shows a more assertive trump administration that somehow we're going to ratchet up the pressure on the assad regime, trying to produce regime chairntion then i would be very much interested in hearing more about how that is going to occur and beyond that, if assad is forced out, then what? what do we think the united states will inherited, and what will the united states do with that inheritance, recalling the situation after regime change in iraq and libya, you know, those seem to be reasonable questions. >> woodruff: sarah sewall, how do you gauge what happened? >> it's very difficult to know right now, judy. we don't know whether this will fall into a category of a symbolic pinprick strike that had no meaningful effect or whether this could be the beginning of something that gets us much more deeply embroiled, whether it's similar to the "no fly" zones that we created in