As Pentagon overhauls nuclear triad, critics advise caution
Video duration: 9:30
The Pentagon is preparing for an extensive -- and expensive -- modernization of the countrys half-century-old land, air, and sea-based nuclear weapons. Supporters contend a fully-equipped nuclear triad is essential for national defense and deterrence, but critics say its time to reexamine the extent of our arsenal in a post-Cold War world. Special correspondent Jamie McIntyre reports.