 Oliver Stone (I) (qv) thought of casting Kevin Costner (qv) as  Sgt. John McLoughlin (II) (qv), his _JFK (1991)_ (qv) lead.  Costner had narrated the 2006 documentary  _On Native Soil (2006)_ (qv), about the 9/11 Commission Reports  investigation of the causes of the terrorist attacks and what could  have been done to prevent them from happening. Paramount Pictures  was concerned that Stone and Costner would then delve into another  conspiracy theory.