Legendary filmmaker Errol Morris discusses his latest film THE UNKNOWN KNOWN at the Institute of Contemporary Arts in London in March 2014. The film is a gripping exploration of the controversial career and philosophy of Donald Rumsfeld, congressman for over fifty years, advisor to four presidents and so-called principal architect of the Iraq war.

 'After twenty years of reviewing films, I haven't found another filmmaker who intrigues me more. Errol Morris is like a magician, and as great a filmmaker as Hitchcock or Fellini'  - Roger Ebert

Here Morris discusses his attempts to interview a politician renowned for his linguistic gymnastics, and an uncanny ability to use rhetoric to bewitch and befuddle, and the cat and mouse game that ensued during the making of the film.