Mann assigned Janice Polley, a former collaborator on "The Last of the Mohicans", as the film's location manager. Scouting locations lasted from August to December 1994. Mann requested locations which had not appeared on film before, in which Polley was successful – fewer than 10 of the 85 filming locations were previously used. The most challenging shooting location proved to be Los Angeles International Airport, with the film crew almost missing out due to a threat to the airport by the Unabomber. On the DVD commentary, Mann noted it would be impossible to film the airport climax in the same way following the events of 9/11.