North Korea at the top of the agenda as Mattis heads to Seoul

https://www.washingtonpost.com/world/north-korea-at-the-top-of-the-agenda-as-mattis-heads-to-seoul/2017/01/30/091e63d5-c461-49f6-b72a-52e96552aa1a_story.html?utm_term=.25694652e763