In his latest book, "LBJ & McNamara," Peter Osnos's dedication reads this way: "To those on the Vietnam Wall on the Mall and their countless Vietnamese counterparts. It did not have to happen." In his role as publisher at PublicAffairs Books, Osnos spent numerous hours working with former Defense Secretary Robert McNamara for his 1995 book, "In Retrospect: The Tragedy and Lessons of Vietnam." Osnos writes: "This book describes what happened in the years between 1963 and McNamara's last day as Secretary of Defense in February of 1968. Robert McNamara died in 2009 at the age of 93. 

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