Bill Clinton’s brief trip to Pyongyang secured the freedom of two American journalists, Laura Ling and Euna Lee, who were imprisoned in North Korea. But what does the visit between Clinton and the elusive Kim Jong Il say about the future of U.S.- North Korean relations? The Takeaway’s guest, Professor Charles Armstrong, is Director of the Center for Korean Research at Columbia University. He explains how the former president’s visit could help break through the diplomatic log jam.