In this episode of The Story Behind the AP Story, we hear from Lauran Neergaard and Shelby Lum, who have been following the journey of animal to human transplants, or xenotransplants, over the last few years.

On an episode of “The Story Behind the AP Story,” Associated Press space writer Marcia Dunn discusses the space odyssey of NASA’s two stuck astronauts.

Tributes to former President Jimmy Carter are pouring in from his small hometown of Plains, Georgia, and around the world.