His bestseller Hughes: The Private Diaries, Memos and Letters was released on September 11, 2001. Hack was being interviewed live on the Today show by Matt Lauer when the first plane crashed into the World Trade Center, and Matt consequently had to cut short the interview to report on the ongoing events. The abrupt ending of their interview and the early reports of the attack from the Today show, is shown in a continuous loop, as part of an exhibit in the National September 11 Memorial & Museum in New York City.

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