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U.S. Secretary of State John Kerry, left, and Japanese Prime Minister Shinzo Abe sit down for their meeting at Abe's official residence in Tokyo Monday, April 15, 2013. Kerry is in Tokyo as part of Asian tour amid a tense situation over a possible missile launch by North Korea. (AP Photo/Paul J. Richards, Pool)

Kerry visits North Asia

U.S. Secretary of State John Kerry arrived in South Korea on an unusual diplomatic journey, traveling directly into a region bracing for a possible North Korean missile test and risking that his presence alone could spur Pyongyang into another headline-seeking provocation.