North Korea has grabbed international headlines. Again. Pyongyang staged its 4th nuclear test, supposedly a thermonuclear device.
Proposals for more sanctions and further isolation likely will grow. However, the test dramatically demonstrated that the U.S. attempt to build a cordon sanitaire around North Korea has failed.
Washington instead should develop a new policy focused on engagement, not denuclearization. The latter should remain an objective, but even if it remains out of reach the U.S. might be able to reduce military threats on the peninsula.
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