In this undated image released by The Penguin Press, author John Lewis Gaddis is shown. On Monday, April 16, 2012, Gaddis won the Pulitzer Prize for biography for "George F. Kennan: An American Life."... more 
In this undated image released by The Penguin Press, author John Lewis Gaddis is shown. On Monday, April 16, 2012, Gaddis won the Pulitzer Prize for biography for "George F. Kennan: An American Life." (AP Photo/The Penguin Press, Michael Marsland) less 
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Associated Press | Photo By The Penguin Press, Michael Marsland
Mon, Apr 16, 2012 3:54 PM EDT