Ehud Barak

Former Minister of Defense and Prime Minister of Israel; Most Decorated Soldier in Israel's History

Nicholas Kristof & Sheryl WuDunn

Pulitzer Prize-Winning Journalists for "Half the Sky" & Human Rights Advocates

Kal Penn

Actor, Writer, Producer & Former Associate Director of the White House Office of Public Engagement

George P. Bush

Politician & Land Commissioner of Texas

Dean Karlan

Behavioral Economist, Social Entrepreneur & Author

Congressman Ron Paul

United States Congressman from Lake Jackson, Texas, a physician, a bestselling author, and a former 2008 U.S. presidential candidate

Ralph Nader

Consumer Advocate, Lawyer & Author; Former Independent Presidential Candidate

Rich Lowry

Editor in Chief of the National Review

Bernard Kouchner

Former Minister of Health of France; Founder of Nobel Peace Prize-Winning Médecins Sans Frontières

Parag Khanna

Managing Partner at FutureMap; Strategic Advisor to Governments & Global Companies; Bestselling Author; TED Speaker

Ronan Farrow

Investigative Reporter, Activist & Lawyer

Marcus Luttrell

Decorated Navy SEAL & Bestselling Author of "Lone Survivor"

Ari Melber

Emmy Award-Winning Journalist, MSNBC Chief Legal Correspondent & Host of "The Beat with Ari Melber"

Watch The Beat with Ari Melber Highlights: Sept. 11

Ari Berman

Political Correspondent & Author

Iran Hikers

Shane Bauer, Josh Fattal & Sarah Shourd

Chris Herren

Former NBA Player & Speaker on Substance Abuse Disorder and Wellness

Hugh Evans

Humanitarian; Founder & CEO of Global Poverty Project

Gregory Boyle

Roman Catholic Priest of the Jesuit Order; Founder of Homeboy Industries

David Brody

Interviewing America's Newsmakers

Arne Duncan

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

Michael Bloomberg

Former 2020 Democratic Presidential Candidate & Mayor of New York City; Founder of Bloomberg LP & Bloomberg Philanthropies

Harold Ford, Jr.

Former U.S. Representative & Fox Political Contributor; Co-Host of The Five; Regional President at PNC Bank (NY)

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Rye Barcott

Co-Founder & CEO of With Honor, Veteran and Author of "It Happened on the Way to War"

Ted Rall

Nationally Syndicated Cartoonist

Planet Money

NPR's Multimedia Team on the Global Economy

Somaly Mam

Survivor & Anti-Sex Slavery Activist

Jared Cohen

President, Jigsaw (previously Google Ideas) & Chief Advisor to Alphabet Executive Chairman (former Google CEO) Eric Schmidt

John Zogby

Trendspotter & Leading Pollster

Jalen Rose

Former ESPN Analyst & NBA Player

John Wood

Founder & Board Co-Chair of Room to Read; Former Microsoft Marketing Executive