Politics Jan 31

Host of challenges ahead for new defense secretary

As defense secretary, Ashton Carter would face a daunting pile of problems at home and abroad. And then there are the unforeseen crises, the ones that explode onto a Pentagon chief's agenda without warning.

As secretary of defense, Chuck Hagel has faced a number of tough challenges, including the Syrian conflict, the rise of the Islamic State and the future of U.S. forces in Afghanistan. Judy Woodruff takes a closer look at the reasons…

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