A couple observations:
I note that the two writers (former Clintonistas who were involved with the completely failed agreements w/ Korea in the past) do not consider the threat imminent. They refer to a policy of "preemption". I have consistently argued that you are missing the essence of the debate by your refusal to note exactly what "imminent" means. The clear implication is that these two writers understand the difference and suggest that Bush was not making an "imminent threat" the issue in the run up to the current Iraq war. They go so far as to call a preemption policy “prudent.”
I think their proposal is silly. Launching a cruise missile would still leave a mad man with enough plutonium to make 6-8 nuclear bombs. I would think that field testing our current anti-missile systems would be enough of a deterrent and less aggressive than a missile strike.
Cheers,
PP