U.S. Secretary of State John Kerry arrived in Seoul on Friday (April 12) just hours after a U.S. government agency said North Korea had a nuclear weapon it could mount on a missile, but the assessment was swiftly dismissed by several U.S. officials and South Korea.<br /> <br />North Korea will dominate talks when Kerry meets South Korea's leadership in Seoul, including South Korean President Park Geun-hye and Foreign Minister Yun Byung-se later on Friday.<br /> <br />The Defense Intelligence Agency (DIA) said it had concluded with "moderate confidence" that North Korea had developed a nuclear bomb that could be fitted on a ballistic missile, but added such a weapon would probably be unreliable.<br /> <br />Its assessment was made public by a U.S. lawmaker amid soaring tension on the Korean peninsula and just hours before Kerry arrived on a visit to the region that will include stops in China and Japan.<br /> <br />North Korea has stationed as many as five medium-range missiles on its east coast, according to
