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.
A year after the London bombings killed 52 people and injured 700, news outlets reported that police and federal investigators disrupted a plot for an attack on New York City tunnels. Diane and her guests talk about efforts to prevent and prepare for a terrorist attack on America.
- Bruce Hoffman Director of the RAND Corporation's Washington, DC office. He holds the RAND Corporate Chair in Counterterrorism and Counterinsurgency, and is author of "Inside Terrorism."
- Joseph Cirincione President, Ploughshares Fund
- Edward Reiskin Deputy mayor of Washington, DC for public safety and preparedness
- Mayor Chris Bollwage Elizabeth, New Jersey
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