The close relationship that once existed between Moscow and Pyongyang is a relic of the Cold War. In fact, there is reason to believe that the two neighbors now share little in common. Yet decades ago, the Soviets exercised tremendous influence over the North Korean regime, anecdotally evidenced by Kim Il-sung's fateful request to Josef Stalin asking to invade the South in 1950. Stalin, after much consternation, finally gave his approval.1 By deferring to Stalin, Kim Il-sung sought continued Soviet support, which he received for roughly 40 years until the breakup of the Soviet Union. In the early 1990s, however,...