South Korea 'very much worried' by possible U.S. military strike on North Korea, says adviser

A senior policy adviser to the South Korean president says his country is “very much worried about American unilateral military action on North Korea" and a possible "full-blown escalation conflict.” Moon Chung-in, the South Korean president's senior foreign policy and unification adviser, joins Judy Woodruff to discuss reopened communication between North and South Korea.