PBS Newshour: Caroline Kennedy on why this is a critical time for U.S. and Japan

U.S. Ambassador to Japan Caroline Kennedy was greeted warmly when she arrived in Tokyo last year. But the region, overshadowed by conflicts in the rest of the world, is facing troubles. Gwen Ifill sat down with Kennedy to discuss ongoing territorial disputes with China, the status of the President Obama’s pivot to Asia and the existential threat of nuclear weapons in North Korea.