President Barack Obama will be meeting with Asian leaders in Washington this week as fears grow that long-smoldering tensions on the Korean Peninsula and in the South China Sea risk flaring into conflict.
World leaders, including those from China, Japan and South Korea, will be in town for a summit hosted by Obama on nuclear security - the final round in the U.S. president's drive for international action to stop materials that could be used for an atomic weapon or dirty bomb from getting into terrorist hands.
But other pressing security issues will be up for discussion on the sidelines of the two-day gathering that starts Thursday.
