In this June 22. 2010, file photo, Defense Secretary Robert Gates looks on as President Obama speaks in the Cabinet Room of the White House in Washington. Mr. Gates says he plans to leave his job next year. (AP Photo/J. Scott Applewhite, File)

Photo by: J. Scott Applewhite

In this June 22. 2010, file photo, Defense Secretary Robert Gates looks on as President Obama speaks in the Cabinet Room of the White House in Washington. Mr. Gates says he plans to leave his job next year. (AP Photo/J. Scott Applewhite, File)