By "Captain Wing-Ding", most assume that you are referring to Trump.
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You need to do a little more background reading before you comment.
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North Korea has enough conventional artillery positioned on the DMZ, that they could annihilate Seoul and it's 20 million people within 10 minutes.  That's why journalists use the 60 km term, because that's the range of conventional artillery.  They don't need nukes, nor the fallout as you suggest, to win their war.
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North Korea is not threatening the world, just the US, and probably for good reason.
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Try to catch up.