This Sunday: Year in review with CBS correspondents

      |CBS News chief Washington correspondent Bob Schieffer previews Sunday's show. It's a look at the year in review and what's ahead in 2012 with a roundtable discussion among CBS News correspondents. Norah O'Donnell, John Dickerson, Nancy Cordes, David Martin, Bob Orr, Anthony Mason and Elizabeth Palmer will join Schieffer.

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