'Late Shift' Author Bill Carter Pens David Letterman Tribute: Laughs, Legacy and Leno - Hollywood Reporter

'Late Shift' Author Bill Carter Pens David Letterman Tribute: Laughs, Legacy and Leno - Hollywood Reporter: The bulk of Dave's life was defined by a daily routine of scripted laughs and formalized conversations. That is about to change. Associates wonder what it will mean for someone who, at numerous points in his life, conceded he was happy only during the one hour a day when he was taping his show. The birth of son Harry, now 11, clearly added much joy and seemed to mellow Letterman in ways that surprised people.