Any way you slice it, preparing for a preemptive strike would be no farther down than the second-to-last resort, not the last. Preparing to retaliate after they struck first would be the last resort.
If Trump had an ear to my thoughts i would suggest he buy up a failing airline of older passenger jets on their last legs and remove everything not essential and pack them to the roof with everything we got.
Its not unusual now for planes to fly themselves, send a convoy along the normal air routes and then suddenly cross the borders seeking targets.Sure they will shoot a few down but not all of them. Have each ond transmitting pilots voices as well. Say they are being hijacked by sympathetic comrades, like muslims.
Why should NK pay for an outcome that will certainly be the result of Trump's inevitable diplomatic failures [/sarcasm]