NK told SK to stop the live firing exercise in the disputed border area. SK ignored them. NK fired 200 rounds to make a point. SK fired off 60 in some direction? and then ran to grab hold of Uncle Sam's skirts. This round to NK.
As to red lines. If torpedoing a naval vessel killing the crew of 46 is not crossing a red line then what is?
This is the kind of problem the world faces when these rogue regimes obtain/develop nukes.
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