Detailed text transcripts for TV channel - CNN - 20171102:22:59:00
>> reporter: north korea is working to improve rocket fuel to missiles can fly longer distances. missile engines and motor components for greater reliability and targeting and guidance systems for accuracy. >> the north koreans have been able to make tech know logical breakthroughs at a more rapid pace than anticipated. >> reporter: the u.s. continues to believe in 2018, north korea could put a miniaturized nuclear warhead on top of a long-range missile making it able to hit the u.s. chief of staff, john kelly, hinting north korea made progress on the warheads. >> the american people should be...