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.
- Greg Mortenson Author of best seller, "Three Cups of Tea." Co-founder of the Central Asia Institute and recipient of The Star of Pakistan for his work promoting education and peace in the Middle East.
Most Recent Shows
What troubles at Twitter say about the state of social media -- and why one tech watcher argues this could transform the industry in positive ways.
Political analyst Norman Ornstein on control of Congress, the red wave that wasn't, and other lessons from the midterm elections.
At the end of the year Dr. Anthony Fauci will step down from his post as the nation's top infectious disease doctor. He talks to Diane about his 38 years on the job -- and what's next.