Former President Ford died Tuesday in his California home. The NewsHour reports on his legacy. Jim Lehrer interviewed Gerald Ford as part of a special report on presidential debates over the last 40 years. Polar bear numbers are declining, and today the Bush administration recommended they be labeled a ""threatened"" species under the Endangered Species Act. The guests this episode are Gerald Ford, Ellen Fitzpatrick, Michael Beschloss, Richard Norton Smith, Ron Nessen, Dirk Kempthorne. Byline: Jim Lehrer, Clarence Page, Gwen Ifill, Ray Suarez