World leaders react to a historic shift in U.S. policy toward Cuba. Pakistan buries victims of a school massacre by the Taliban. And U.S. officials say North Korea is behind the hacking of Sony Pictures. A panel of journalists joins Diane for analysis of the week's top international news stories.
Fifty years ago, Jonas Salk announced a vaccine against polio. But the disease remains far from conquered. A survivor of childhood polio examines the impact of polio on our culture and what it still can teach us.
- Marc Shell professor of literature at Harvard University and author of "American Babel: Literatures of the United States from Abnaki to Zuni Stutter."
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A panel of journalists joins Diane for analysis of the week's top national news stories.
Bioengineers are creating human body parts to replace organs and manage life-threatening diseases. How techniques like 3-D printing and stem cell research are driving medical advances and raising ethical questions
Cuba releases American contractor Alan Gross after five years' imprisonment on espionage charges. The U.S. releases several Cubans in exchange. Details on the prisoner swap and the future of U.S.-Cuban relations.