To break the cycle of threats from North Korea, the United States must take a much more assertive stance. Leader Kim Jong-un must be put on the defensive by sending him a clear warning of preemptive action if America and its allies find themselves threatened.
Despite a series of increasingly dire North Korean prophecies, international reaction has been largely calm. Many suspect the North's threats are Kim Jong-un's way of proving himself.
North Korea's decision to pull its workers from Kaesong industrial park coincides with speculation that it could carry out a missile test.