AP Photo

For those searching for signs of reform in North Korea, Kim Jong Un has been a godsend. Women on North Korean state TV wore high heels and miniskirts while he sat in the audience. Disney characters, the cultural export of a country North Korea has long demonized, danced onstage. The not-yet-30-year-old Kim, since taking over from father in December 2011, frolicked with school children and was photographed on a rollercoaster with a British diplomat, signaling a level of international openness never seen under the stern Kim Jong Il. He found a pretty wife, Ri Sol Ju, whom the New York Times equated with Britain's Kate Middleton. In a sign of changing times, the new first lady has even been photographed with her husband -- significant because Kim Jong Il was never seen with his...