This week, House of Cards showrunner Beau Willimon and documentary filmmaker Alex Gibney sat down for a discussion at the Paley Center for Media in New York. The Daily Beast's Editor in Chief John Avlon moderated the evening. In this excerpt, Gibney talks about how his 2013 documentary The Armstrong Lie, about cyclist Lance Armstrong’s fall from grace, started out as a comeback story before things took a well-publicized turn.