Why NK has been acting so weird.

Japan is Skeert
Alaska and Hawaii are threatened.
The missile flew about 600 miles in 40 minutes.
About 900 MPH.
But everyone is Acting Like the mushroom clouds are imminent.
These Threats Must Be dealt with.
So, war, or a Brand New Veery expensive missile defense system.

Which will we get?
Both?


Plausible?