Re: Korea
I think that report is substantially hyperbole.
For one thing, I'm sure that even if N. Korea has developed a working nuclear warhead, it is highly unlikely that they have a delivery vehicle capable to reaching the US. Thus far, they have only managed to reach as far as the Sea of Japan.
Even if they have the capabilities that are claimed, I believe that the US have anti-missile missiles that would destroy any Korean ICBM before it even reached the US.
Assuming that even a single N. Korean warhead exploded on US territory (including Hawaii), I am absolutely sure that the US would retaliate instantly and could easily completely obliterate the whole of N. Korea.
The question is, would China then attack the US? I have a feeling that China are not entirely enamoured of N. Korea and it could well be that agreements have already been made between China and the US. China, unlike Tubby Jong Un, are far more sensible than to start a nuclear exchange that could destroy their country.
We live in interesting times!