seoul u.s. defense secretary jim mattis fly seoul friday annual defense talk tensions north korea climb ahead visit region next month president donald trump mattis emphasize diplomatic efforts find peaceful solution crisis week-long trip asia even north korea weapons test bellicose verbal exchange pyongyang washington stoke fear arm confrontation carry message together today great chance endure peace future mattis say early week look back three days meet asian defense chiefs philippines really keep north korea effort firmly diplomatic lane resolution even land seoul mattis hold meet philippines monday south korea japanese counterparts agree keep bolster intelligence share north korea enhance exercise get roll sleeves work pragmatic plan coordination tell reporters japanese defence minister itsunori onodera warn threat north korea grow critical imminent level cia chief mike pompeo say last week north korea could months away develop ability hit unite state nuclear weapons scenario trump vow prevent u.s. intelligence experts say pyongyang believe need weapons ensure survival skeptical diplomatic efforts focus sanction get pyongyang denuclearize unite state thursday impose sanction seven north korean individuals three entities flagrant human right abuse include kill torture force labor hunt asylum seekers abroad mattis expect meet south korean leaders friday join top u.s. military officer marine general joseph dunford annual security consultative meet south korea military saturday visit come trump depart nov. japan south korea china vietnam philippines trip expect dominate nuclear ballistic missile threat pose north korea trump speech last month unite nations threaten destroy north korea necessary defend ally kim blast trump mentally derange despite rhetoric white house officials say trump look peaceful resolution standoff options include military ones table mattis part dismiss idea u.s. ally confuse u.s. approach note u.s. secretary state rex tillerson recent trip beijing get china pressure pyongyang china north korea big trade partner military options defense attack ally attack course everyone peaceful resolution mattis tell reporters travel early week one rush war mattis visit seoul defense talk tensions climb