A visit to North Korea by U.S. envoy Stephen Bosworth ended in failure Thursday to convince the North to return to multilateral nuclear disarmament talks. "We identified some common understandings on the need for and the role of the six-party talks and the importance of the implementation of the 2005 Joint Statement," Bosworth told reporters. "It remains to be seen when and how [North Korea] will return to the six-party talks." He added, "This is something that requires further consultations among all six of us." But Bosworth claimed he had "very useful" meetings with senior North Korean officials. Further bilateral...