President Obama nominated Ashton Carter to replace Secretary of Defense Chuck Hagel. (Chip Somodevilla/Getty Images)
As Chuck Hagel steps down, President Obama taps long-time Pentagon adviser Ashton Carter.
Read more...More missile interceptors will be set up in California and Alaska.
Read more...At least 18 Afghans, including a policeman and several children were killed Saturday.
Read more...Only four Republicans voted in Hagel's favor.
Read more...Multiple secretaries who were by Obama's side in the first term are leaving.
Read more...The Senate confirmed Kerry as Secretary of State on Tuesday and Hagel is on the Hill on Thursday.
Read more...Women can now serve in positions that match their capabilities.
Read more...Former Secretary of State Colin Powell called former Sen. Chuck Hagel "superbly qualified."
Read more...Both are controversial choices based on past records.
Read more...Sen. Chuck Hagel, Ret. is expected to be nominated for Secretary of Defense on Monday. (Chris Huffstutter/Creative Commons)
The confirmation of the former Republican senator is not expected to be an easy task.
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