US envoy to discuss N. Korea with Seoul officials

A senior US diplomat will discuss how to handle an increasingly defiant North Korea in a standoff over its nuclear program when he meets with South Korean officials in a series of meetings Monday. Kurt Campbell, the assistant secretary of state for East Asia and Pacific affairs, heads to Thailand later Monday for Asia's main security conference, at which North Korea is also expected to be a key topic. North Korea quit international talks aimed at ending its nuclear ambitions in April in anger over a UN rebuke after it launched a long-range rocket. It has since further escalated tensions, conducting a nuclear test in May and a series of banned ballistic missile tests earlier this month.