North Korea has a nuclear weapons delivery system

North Korean nuclear capability was inadvertently revealed this week when a congressman read a portion of a DIA report "He said, reading from the report: "DIA assesses with moderate confidence the North currently has nuclear weapons capable of delivering by ballistic missiles, however the reliability will be low.''
North Korea has announced their intent.  Now they apparently have some capability. 

But policymakers are reduced to hedging about the reliability of their systems? 

Hope is not a strategy.