We're going to look now at an animal whose habitat is slowly disappearing. Polar bears live on sea ice. But Arctic sea ice, which used to stay frozen in the summertime, is now slowly disintegrating. This poses a unique challenge for scientists, government officials and others. How do you preserve the polar bear and prevent it from going extinct decades from now? Juliet Eilperin of The Washington Post has been reporting on this issue. And she joins us now to talk about what she's learned.