Donald Rumsfeld has never been at a loss for words. As the US Secretary of Defense from 2001 to 2006, Rumsfeld wielded words both to charm and to bully. His press conferences were lopsided battles where he controlled the flow of information and rarely left time for follow-up questions. In The Unknown Known, he gives in to a different kind of interview with the Academy Award-winning filmmaker Errol Morris. Whether you think Rumsfeld is a patriot or a liar, he’s never less than mesmerising. His dialogue with Morris is like a verbal duel, retracing controversial flashpoints such as the invasion of Iraq, accusations of torture, and the revelations of Abu Ghraib.