washington u.s. air force b-1b lancer bombers escort fighter jet fly international airspace water east north korea saturday show force pentagon say demonstrate range military options available president donald trump flight disclose shortly north korea foreign minister due address unite nations farthest north demilitarize zone separate north south korea u.s. fighter jet bomber fly 21st century pentagon say mission demonstration u.s. resolve clear message president many military options defeat threat say pentagon spokeswoman dana white call north korea weapons program grave threat prepare use full range military capabilities defend u.s. homeland ally flight follow week heighten rhetoric washington pyongyang trump kim jong un trade insult trump call north korean leader madman friday day kim dub mentally derange u.s. dotard pyongyang conduct sixth large nuclear test sept. launch dozens missiles year accelerate program aim enable target unite state nuclear-tipped missile north threaten test hydrogen bomb pacific pentagon say b-1b lancer bombers come guam u.s. air force f-15c eagle fighter escort come okinawa japan say operation show seriousness take north korea reckless behavior u.s. bombers fly north korea 's coast show force