Adam Ostrow

Chief Digital Officer, TEGNA

Al Roker

Co-Host NBC Today Show Media Entrepreneur, Author

Alan Cooper

Software Designer and Author, Known for Humanizing Technology

Alexa von Tobel

Founder & CEO of Learnvest.com; New York Times Bestseller Author of "Financially Fearless"

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Amory Lovins

Co-Founder & Chairman Emeritus of Rocky Mountain Institute

Anant Agarwal

CEO of edX & Professor at MIT

Andrea Mitchell

Host of MSNBC’s "Andrea Mitchell Reports" & Chief Foreign Affairs Correspondent for NBC News

Andrea Mitchell - Celebrating 15 years of "Andrea Mitchell Reports"

Andrew McAfee

Co-Founder & Co-Director of Initiative on the Digital Economy; Principal Research Scientist at MIT Sloan School of Management

MIT Scientist On The Radical Mindset that Drives Extraordinary Results

Andrew Zimmern

Four-Time James Beard Award-Winning TV Personality, Chef, Writer & Teacher

Anne-Marie Slaughter

Foreign Policy Expert, Author & CEO of New America Foundation

Anousheh Ansari

CEO of X Prize Foundation & First Female Private Space Explorer

Antonio Damasio

Director of the Brain Institute

Arne Duncan

Managing Partner at Emerson Collective; Former U.S. Secretary of Education

Austan Goolsbee

Chairman, President's Council of Economic Advisers (2010-2011) and Professor of Economics, University of Chicago Booth School of Business

Ben Silverman

Ben Silverman, the Emmy and Golden Globe Award-winning producer is the Founder and Chairman of Electus.

Bharat Balasubramanian

Professor at the University of Alabama College of Engineering; Former Vice President of Group Research and Advanced Engineering and Product Innovations & Process Technologies at Daimler AG

Bill Gates

Co-Founder of Microsoft; Co-Chair of the Bill & Melinda Gates Foundation

Bill Nye

"The Science Guy"; Science Communicator, TV Presenter & Mechanical Engineer; Climate Change Activist

Biz Stone

Co-Founder of Twitter