Ex-Joint Chiefs Chairman: US-China 'Most Important Bilateral Relationship in This Century'

From the anticipated U.S.-North Korea summit to concerns of a trade war with China and others, the United States faces several foreign policy challenges with a White House national security team in transition. On this week's edition of "Plugged In with Greta Van Susteren," several experts, including retired Admiral Michael Mullen, former chairman of the Joint Chiefs of Staff, discuss those challenges and what they mean for U.S. foreign policy going forward. Elizabeth Cherneff has more.