Ben Bernanke

Obama Federal Reserve.JPEG-017c8.jpg

Janet Yellen, vice chair of the Board of Governors of the Federal Reserve System, smiles as President Barack Obama speaks in the State Dining Room of the White House in Washington, Wednesday, Oct. 9, 2013, where the president announced he is nominating Yellen to be chair of the Federal Reserve, succeeding Ben Bernanke. (AP Photo/Pablo Martinez Monsivais)