FILE - In this Aug. 20, 2008 file photo, author and biographer Robert Allan Caro is shown during an interview in New York. In "The Passage of Power," the fourth of five planned volumes on Lyndon ... more 
FILE - In this Aug. 20, 2008 file photo, author and biographer Robert Allan Caro is shown during an interview in New York. In "The Passage of Power," the fourth of five planned volumes on Lyndon Johnson, Caro devotes more than 100 pages to the events immediately before, during and immediately after Nov. 22, 1963. (AP Photo/Bebeto Matthews, file) less 
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Associated Press | Photo By Bebeto Matthews, file
Mon, Apr 30, 2012 8:40 AM EDT