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Arianna Huffington

Founder, The Huffington Post

Arianna Huffington | September 15, 2010 | Wortham Center | The Progressive Forum

Barry Scheck

Cofounder of the Innocence Project

Barry Scheck | November 18, 2013 | Wortham Center | The Progressive Forum

Richard Leakey

Paleoanthropologist, Conservationist, Statesman

Richard Leakey | October 28, 2010 | Wortham Center | The Progressive Forum

James Hansen

Director, NASA Goddard Institute for Space Studies

James Hansen | December 7, 2009 | Wortham Center | The Progressive Forum

Nikole Hannah-Jones

Pulitzer Prize Winner

Karen Armstrong

Religious Historian