fɹʌm tˈuː θˈaʊzənd θˈɜːtiːn ʌntˈɪl hɪz dˈɛθ, hiː wˈɜːkt æz ɐ spˈɛʃəl kənsˈʌltənt fɚðə vˌiːətnˈɑːm wˈɔːɹ fˈɪftiəθ ˌænɪvˈɜːsɚɹi kəmˌɛmɚɹˈeɪʃən pɹˈɑːdʒɛkt ɹˈʌn ˌaʊɾəv ðɪ ˈɑːfɪs ʌvðə sˈɛkɹətɹi ʌv dᵻfˈɛns ænd hɐz ˈɔːlsoʊ sˈɜːvd æz kənsˈʌltənt tə kˈɛn bˈɜːnz pɹədˈʌkʃən əvə dˌɑːkjuːmˈɛntɚɹi hˈɪstɚɹi ʌvðə vˌiːətnˈɑːm wˈɔːɹ bɹˈɔːdkæst ɪnðə fˈɔːl ʌv tˈuː θˈaʊzənd sˈɛvəntˌiːn baɪ pˌiːbˌiːˈɛs.
From 2013 until his death, he worked as a special consultant for the Vietnam War 50th anniversary Commemoration project run out of the Office of the Secretary of Defense and has also served as consultant to Ken Burns' production of a documentary history of the Vietnam War broadcast in the fall of 2017 by PBS.