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.

Nov 24

Watch: Defense Secretary Chuck Hagel resigns

Hagel is the first senior Obama adviser to leave the administration following the sweeping losses for Obama's party in the midterm elections. It also comes as the president's national security team has been battered by multiple foreign policy crises, include…

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