washington president donald trump warn north korea tuesday u.s. military option would devastate pyongyang say use force washington first option deal country ballistic nuclear weapons program totally prepare second option prefer option trump say white house news conference refer military force take option devastate tell devastate north korea call military option take bellicose statements trump north korean leader kim jong un recent weeks create fear miscalculation could lead action untold ramifications particularly since pyongyang conduct sixth powerful nuclear test sept. 3. despite increase tension unite state detect change north korea military posture reflect increase threat top u.s. military officer say tuesday assessment marine corps general joseph dunford chairman u.s. joint chiefs staff pyongyang military stance contrast south korean lawmaker say pyongyang boost defenses east coast political space clearly charge right see change posture north korean force watch closely dunford tell senate arm service committee hear reappointment post term sense urgency north korea certainly pose great threat today dunford testify u.s. official speak condition anonymity say satellite imagery detect small number north korean military aircraft move north east coast however official say activity change assessment pyongyang military posture north korean foreign minister ri yong ho monday accuse trump declare war north threaten pyongyang would shoot u.s. warplanes fly near korean peninsula american bombers fly close last saturday ri react trump twitter comment kim ri around much long act threats toward unite state north korea work develop nuclear-tipped missiles capable hit u.s. mainland trump say never allow dunford say pyongyang nuclear-capable intercontinental ballistic missile soon matter short time clearly posture force respond event provocation conflict general say add unite state take proper measure protect ally include south korean japan would incredibly provocative thing conduct nuclear test pacific suggest think north korean people would realize serious would unite state international community dunford say south korean lawmaker lee cheol-uoo brief country spy agency say north korea bolster defenses move aircraft east coast take measure flight u.s. bombers lee say unite state appear disclose flight route intentionally north korea seem unaware u.s. air force b-1b lancer bombers escort fighter jet fly east north korea show force heat exchange rhetoric trump kim unite state impose sanction 26 people part non-proliferation designations north korea nine bank include tie china u.s. treasury department office foreign assets control sanction say tuesday u.s. sanction target people north korea north korean nationals china russia libya dubai accord list post agency website u.s. secretary state rex tillerson visit china thursday saturday talk senior officials include crisis north korea trade state department say tuesday evans revere former senior diplomat meet north korean delegation switzerland month say pyongyang reach organizations individuals encourage talk former u.s. officials get sense trump administration think also accept invitations attend dialogues host others include swiss russians say revere say best guess north koreans puzzle unconventional way president trump handle north korea issue eager use informal unofficial meet gain good understand motivate trump administration visit india u.s. defense secretary jim mattis say diplomatic efforts continue speak beijing chinese foreign ministry spokesman lu kang say war korean peninsula would winner hope u.s. north korean politicians sufficient political judgment realize resort military force never viable way resolve peninsula issue concern lu say south korean president moon jae-in urge kim jong un resume military talk reunions families split 1950-53 korean war ease tension like say multiple time north korea stop reckless choices table talk negotiations always remain open moon say moscow russia foreign ministry say work behind scenes find political solution plan hold talk representative north korea foreign ministry due arrive moscow tuesday ria news agency cite north embassy russia say unite state south korea technically still war north korea 1950-53 conflict end truce peace treaty trump military option north korea prefer would 'devastating