unite nations north korea foreign minister ri yong ho tell unite nations saturday u.s. president donald trump make rocket visit entire u.s. mainland inevitable call north korean leader kim jong un rocket man prolong arduous struggle finally step away final gate completion state nuclear force ri tell annual gather world leaders unite nations general assembly forlorn hope consider chance dprk north korea would shake inch change stance due harsh sanction hostile force say north korea say rocket u.s. 'inevitable trump dub kim 'rocket man