The current system for countering ballistic-missile attacks on the US homeland by rogue states may not be capable of coping with future developments in the North Korean nuclear arsenal. The problem is that long-range missiles equipped with multiple warheads and/or decoys present too many targets that must be intercepted for the modest capabilities of the US defensive network. The Pentagon is pursuing a Next Generation Interceptor that can defeat limited attacks more reliably, and contractor Lockheed Martin says it is making rapid progress in developing a prototype. I have written a commentary for Forbes here.
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