preventive. what do you mean by that? >> preventive, it's so grave -- >> that's preemptive. >> no, preemptive is if you see an imminent threat, for example, the lighting up of missiles -- this is a leader who said and his people have said he is going to target the u.s. -- >> understood. >> and obviously, south korea, which lives under the gun of the regime. >> and about 50,000 u.s. servicemen and their families. >> what we have to do is help define with our allies to define these decision points. there may be some really, really tough choices. everybody wants to resolve this short of military conflict. everybody knows how costly that could be. how unpredictable it is once you begin this interaction, military