"In this May 10, 2012 photo, author David McCullough, two-time Pulitzer Prize winner for books ""Truman"" and ""John Adams,"" walks over the Brooklyn Bridge while being interviewed in New York. McCullough is celebrating the 40th anniversary of his book ""The Great Bridge,"" which has just been reissued with a new introduction by the 78-year-old writer. (AP Photo/Bebeto Matthews)"
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