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Breakthrough. >> so there you have the view here from russia. the country's officials say they believe their nation is being demonized. a a spokesman b for vladimir putin says he feels the u.s. is humiliating itself by the discussions that are going on right now. but a lot of this has pragmatic reasons. the russians had hoped that relations would improve very quickly. so far that has not materialized. >> those hopes are dampered a little bit. fred pleitgen, thank you so much. still to come, pure coincidence or timed intensally. the u.s. secretary of state held meetings on north korea. the re...

Knowledge. in may, north korea claiming it has miniaturized nuclear weapons small enough to put on a missile. >> this situation is dangerous. there's no constraints on his program, and north korea seems determined to build up the nuclear arsenal. >> reporter: they also seem determined to develop rocket technology despite the sanctions, including recent upgrades to a launch site. they believe there's a movable building and a cover over the launch pad designed to hide activity from prying eyes in the sky. but the space scientists said their purpose is peaceful. >> reporter: our launch is no thre...

Because they use basic scud rocket technology, miniaturizing a warhead wouldn't be as big of an issue. >> you could potentially have a larger warhead on a delivery system, if it doesn't have to go nearly as far. >> reporter: but long-range ballistic missiles are another story. to reach the u.s., north korea would have to perfect an icbm like its taepodong ii. it's estimated that missile could travel 4,200 miles, which means it would still be short of hitting mainland cities like seattle and los angeles. >> we do not operate on the presumption that they have that fully tested and available capa...

Reach japan. >> officials say north korea has successfully tested muscles with a range of 800 miles. because he is basic rocket technology, it would not be as big an issue. >> you could potentially have a larger warhead on a delivery system if that doesn't have to go as far. >> long-range ballistic missiles are another story. to reach the u.s. north korea would have to perfect a rocket that could put anchorage and possibly honolulu within range. it is estimated that muscle could travel 4200 miles, which means it would still be short of hitting mainland cities like seattle and los angeles. >> w...

North korea has the components to build a nuclear missile. >> i think the delivery on the korean peninsula is something we would expect to see first. i think it's possible they may be able to do that already, and maybe reach japan. >> reporter: officials say north korea has successfully tested at a range of 800 miles. because they use basic scud rocket technology, miniaturizing a warhead wouldn't be as big of an issue. >> you could potentially have a larger warhead on a delivery system, if it doesn't have to go nearly as far. >> reporter: but long-range ballistic missiles are another story. to...