but anything stronger, more powerful, perhaps a reality check. fundamental change in the nuclear program in the u.s. would have to be notified under very lev tre very heavy treaty restrictions, something the russians would know about. there is a long effort to modernize, some worth checking into. what we are being told by defense officials is there is no plans right now for any extra deployment of u.s. forces to the korean peninsula. there is an upcoming exercise that will see a temporary uptick in u.s. forces for that exercise, but, again, no fundamental change. about that comment yesterday about the koreans now having a nuclear warhead. what u.s. officials are saying is the assessment -- assessment -- is that they have produced a miniaturize warhead. but whether it is deployable, whether it's been tested, whether it can really go on a missile and be part of an attack still very much an open question