Pulitzer Prize-winning biographer Jon Meacham on the evolution of Abraham Lincoln's moral principles and political leadership -- and what the era of Lincoln can teach us about the state of our democracy today.
The director of the National Institutes of Health talks about his work and the top health issues of the day, from pharmaceutical and disease research to the health care system.
- Dr. Harold Varmus Co-chairman of the White House Council on Science and Technology, president, Memorial Sloan-Kettering Cancer Center, former director of the National Institutes of Health, and the author of "The Art and Politics of Science".
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