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 panel talks about the gasoline additive MTBE, which reduces the emission of greenhouse gases but has also created major public health concerns in states where it has been detected in groundwater.
- Sen. Dianne Feinstein (D-Ca.)
- Bob Perciasepe Environmental Protection Agency
- Charles Drevna Oxygenated Fuels Association
- Dan Greenbaum Health Effects Institute
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