warn shoot fire north korea trump administration new sheriff town north korea crazy little dictator may need rethink antagonistic behavior may poke wrong tiger secretary state rex tillerson say friday may necessary take pre-emptive military action north korea threat weapons program reach level believe require action tillerson outline tough strategy confront north korea nuclear threat visit world heavily arm border near tense buff zone rival koreas also close door talk pyongyang unless denuclearizes give weapons mass destruction chicago tribunethe us navy seal team kill osama bin lade reportedly set join military train drill north korea first time.along elite us units include army rangers delta force green berets seal team six take part annual train exercise alongside south korean force accord yonhap news big number diverse us special operation force take part year foal eagle key resolve exercise practise missions infiltrate north remove north war command demolition key military facilities south korean official tell news agency.seal team six would practice remove kim jong-un destroy north korea weapons mass destruction south korea defence ministry tell joong ang daily newspaper.north korea already warn merciless attack uss carl vinson us aircraft carrier currently south korean water infringe sovereignty dignity even bite .north korea already warn merciless attack uss carl vinson us aircraft carrier currently south korean water infringe sovereignty dignity even bite .the secretive state last week fire four ballistic missiles sea japan response annual military drill see preparation war.both us south korea maintain exercise purely defensive north south korea technically still war 1950-53 korean war end armistice peace treaty.for entire story independent uk nuclear showdown navy seal team kill osama bin lade take part military drill n. korea