Flight plan? The norks can fly?
Amazing. I thought the plan was to tunnel through the center of the Earth.
Surprisingly enough, apparently not! The trajectories shown are only ballistic trajectories on a planar surface projection of a sphere, such as the map shown. If launched in the directions shown, the missiles would follow great circle routes and end up south of the US.
Nobody with a high school science education was available for this propaganda project, I guess. This is not a credible threat, but "OK, THIS TIME I'M R E A L L Y GONNA DO IT! YOU'LL BE SO SORRY!!!"