Of the three members of the so-called Axis of Evil, North Korea is the outlier. Unlike the other two, Pyongyang has already carried out four nuclear tests and has little interest in ending its efforts until it has demonstrated a viable weapon. It views Libya as the case study for not giving up a weapons program and India and Pakistan, and even Israel, as models for keeping WMD programs while enjoying international acceptance. Neither isolation nor acceptance will alter Pyongyang's perception of its vulnerability without a viable deterrent. But a permanent dialogue mechanism may provide more options for managing North Korea and its impact on regional security and stability than simply trying to ignore it into submission....