North Korea Conundrum Overshadows Nuclear Summit

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Science  30 Mar 2012:
Vol. 335, Issue 6076, pp. 1557
DOI: 10.1126/science.335.6076.1557

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Revelations about North Korea's nuclear program and its latest saber rattling have lent urgency to an international effort to keep nuclear materials out of the hands of terrorists or rogue states. At the Nuclear Security Summit here earlier this week, top officials from 53 nations lauded an initiative begun 2 years ago to secure highly enriched uranium and other fissile material. But the talks were overshadowed by Iran's continued defiance over its uranium enrichment program and North Korea's plans to launch a rocket that the United States and others assert would be a long-range ballistic missile test in violation of U.N. sanctions.