seoul unite state top negotiator north korea arrive south korea tuesday visit come hop rise ease tensions peninsula wake u.s. president donald trump visit lull missile test special representative north korea policy joseph yun meet south korean international officials accord u.s. state department although indication visit include talk north seoul foreign ministry say yun schedule talk south korean counterpart lee do-hoon friday sideline international conference disarmament jointly host ministry unite nations resort island jeju south korea-born yun heart report direct diplomacy recent months kim jong un regime north korea accelerate program nuclear missile test early year use so-called new york channel contact diplomats pyongyang unite nations mission senior state department official tell reuters early november even trump call talk waste time yun quietly try low temperature dangerous nuclear stand-off side show little interest compromise speech council foreign relations oct. 30 yun reportedly say north halt nuclear missile test 60 days would sign washington need seek restart dialogue pyongyang several months unprecedented test early year north korea fire rocket test nuclear weapon since launch ballistic missile japan sept. 15. analysts say early read much break test long lull far year could align seasonal cycle sign behind-the-scenes communications improve relationship vex north korea nuclear missile test well trump heat statements visit seoul last week trump warn north korea prepare use full range u.s. military power stop attack conciliatory appeal ever urge pyongyang make deal end nuclear standoff trump also urge north korea right thing add see movement though decline elaborate comment seem reassure many south korea north korea foreign ministry call trump destroyer world peace stability say reckless remark make regime commit build nuclear force trump muddy water late asia visit tweet north korean leader kim insult call old say would never call kim short fat also say would nice kim become friends indeed noteworthy president several junctures seem open door negotiations north korea say david pressman partner law firm boies schiller flexner help lead north korea sanction negotiations ambassador unite nations former president barack obama however entirely unclear president suggestions reflective strategic shift merely reflective last person happen speak north korea say president make comment top u.s. negotiator arrive south korea amid hop ease tensions