Associated Press: Producers of a Showtime series on global warming due this spring said Thursday it was crucial to get celebrities and Republicans involved to spread the stories beyond people who already believe it's an important issue. The series, "Years of Living Dangerously," begins April 13. Former California Gov. Arnold Schwarzenegger, a Republican who was in Pasadena to promote the series, is among the celebrities who travel to different sites to illustrate the impact of climate change. Matt Damon, Jessica...