Bruce Babbitt, the former Arizona governor who served as secretary of the interior for eight years under President Clinton, will speak at the University of Colorado at Boulder on April 20. Babbitt will speak at 7 p.m. in the University Memorial Center's Glenn Miller Ballroom, in a conversation with CU-Boulder history and environmental studies Professor Patricia Nelson Limerick and Distinguished Professor of law Charles Wilkinson. The talk is free and open to the public.