Former Secretary of State Colin Powell, during an address in Washington, D.C., on March 1, 2010. Jim Watson /AFP/Getty Images hide caption

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President Obama and former Secretary of State Colin Powell at the White House on Dec. 1, 2010. Saul Loeb /AFP/Getty Images hide caption

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Former Secretary of State Colin Powell during his appearance Sunday on CBS News' Face the Nation. Chris Usher/CBS News via Getty Images hide caption

itoggle caption Chris Usher/CBS News via Getty Images