Watch VoirFilms. Former corporate whiz kid Robert McNamara was the controversial Secretary of Defense in the Kennedy and Johnson administrations, during the height of the Vietnam War. Augmented by archival footage and cabinet conversation recordings, Errol Morris gives the conflicted McNamara a platform on which he attempts to confront his and the U.S. government's actions in Southeast Asia in light of the horrors of modern warfare, the end of ideology and the punitive judgment of history.