Implications of Hostile Action From North Korea

Aired: 4/12/2013 | 0:07:30 | Clip
Simmering tensions between the Koreas raises concerns of what will come next. Margaret Warner talks with Patrick Cronin of Center for a New American Security and retired Marine Lt. Gen. Chip Gregson Jr., a former assistant secretary of defense, about past conflicts with North Korea and how the U.S. might respond in the future.