According to the new laws, North Korea will now not only retaliate if attacked, it will launch a preemptive attack if it detects signs that it is about to be attacked.
This is not completely unreasonable for North Korea. If it were attacked, the first move of its attacker would be to take out its nuclear capability. Therefore, to get any use from its nuclear weapons, it would need to use them in a first strike mode.
However, there arises the danger that North Korea might imagine it was about to be attacked, when this was not actually the case. This could precipitate a needless nuclear war.
The best solution for North Korea would be to make it impossible for any other nation to take out its nuclear capability. It could then hold its nuclear weapons in reserve, and would not need to immediately launch them at the first hint of a pending invasion.
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