Andrew Sullivan, Richard Freeman

Chris Beam, Gary Rosen

Gov. Mike Huckabee, Matt Taibbi

Norman Ornstein, Muhammad Yunus

Neil Shubin

Peter Hopkins, Jared Cohen

Deborah Tannen

Lou Dobbs, David Levy

Allan Sloan, Eric Weiner

Malcolm Gladwell, Andrew Young

Stephen Colbert's Sport Report

Debra Dickerson, Charles Nesson

Marjane Satrapi, Rick Warren

Joe Quesada, Alex Ross

Carl Hiaasen, Frans de Waal

Tim Harford, Andrew Napolitano

Tony Campolo, Jacob Weisberg

Angelo Falcon, Bob Dole

Richard Brookhiser, Tad Devine

Mark Moffett

Aubrey de Grey, Philip Zimbardo

Gov. Eliot Spitzer, Eleanor Holmes Norton, Lisa Randall

David Gracer, Richard Thompson Ford

John Feinstein, Leonard Nimoy

Henry Louis Gates Jr.

Tony Snow

Richard Brookhiser, Ingrid Newkirk

Lorin Maazel, Shashi Tharoor

William Donohue, Howard Dean, Jennifer 8. Lee

Robert Reich, Gregory Rodriguez

John Legend

George McGovern

Geraldo Rivera

Howard Kurtz

Hussein Ibish, Sudhir Venkatesh

Samantha Power

Carole King

Dee Dee Myers

Dean Kamen

Eric Alterman, Michael Reynolds

Van Jones

R.E.M.

Clay Shirky

Trevor Paglen, Jesse Ventura

Madeline Albright

Jeff Gore

Robin Wright

John Legend, Mayor Michael Nutter, Chris Matthews

Michelle Obama, The Roots

Philadelphia Eagles Cheerleaders, Gov. Ed Rendell

Hillary Clinton, Patrick Murphy, John Edwards, Barack Obama

Fr. James Martin, Sen. Bernie Sanders

Susan Jacoby

Mitch Albom

Maria Shriver

Feist

Anne Lamott

Donna Brazile, Noah Feldman

James Kunstler

Carl Hiaasen

Nathan Gunn

Hasan Elahi, George Johnson

Arianna Huffington

Dr. Mehmet Oz

Jennifer Hooper McCarty

Laura Dern, Grover Norquist

Andrei Cherny

Tony Perkins, Brian Greene

Sen. Claire McCaskill

Tad Devine, David Sirota

Jon Paskowitz

George Will

Rep. Bob Barr, Salman Rushdie

Pat Buchanan

Phil Weiss

Alan Rabinowitz

David Hajdu

Winona LaDuke, Dixon Despommier

Kenneth Miller

Neal Katyal, Jonathan Zittrain

Uma Mysorekar, Junot Díaz / Lexicon Artist

Bishop N.T. Wright

Barbara Ehrenreich

Jason Bond, Will Smith

Paul Goldberger, Neil deGrasse Tyson

Rep. Robert Wexler

Lama Surya Das, Daniel C. Esty

Julia E. Sweig, Jason Riley

Rush

Elizabeth Edwards

Sen. Jim Webb

Lucas Conley

Nas

Laurie Goodstein, Garrett Reisman

Toby Keith

Eric Roston

Crosby, Stills & Nash

Buzz Aldrin

Lucas Conley, The Apples in Stereo

David Carr

Jason Bond, Kevin Costner

Devin Gordon, Thomas Frank

Jorge Ramos

Joey Cheek, Jane Mayer

Dick Meyer

Bing West

Rep. Bob Barr, Scott McClellan

Gov. Mike Huckabee

Richard Brookhiser

John McWhorter

Laura D'Andrea Tyson

Doris Kearns Goodwin

Adam Brickley, Ron Paul

Gov. David Paterson

Peter J. Gomes

Tyson Slocum, Rick Reilly

Robert Lutz

Maria Bartiromo

Jackson Browne

Joe Nocera, Cornel West

Nick Carr

Paul Begala

James Taylor

Dave Levin

Stephen Greenblatt, Naomi Klein

Jim Cramer

Nate Silver

Joe Scarborough

David Gergen, Oliver Stone

Bethany McLean, Kathleen Parker

Joseph Stiglitz

Shai Agassi

Brent Glass, Robert Greenwald

Fareed Zakaria, Wynton Marsalis

Michael Farris

David Frum

Jonathan Alter

Yo-Yo Ma

Brian Moore, Sherman Alexie

David Simon

Wilco

Charlie Cook, Andrew Sullivan

Ambassador Andrew Young

Rachel Maddow

Dan Savage, Kevin Johnson

Bob Woodward

Stephen Moore

Malcom Gladwell

Paul Simon

Michael Lewis

Cory Booker, Thomas L. Friedman

Khaled Hosseini, Roland Fryer

Jeffrey Goldberg

Barbara Walters

Sen. Bob Graham, Nicholas Wade

Geoffrey Canada

Kevin Bacon, Charlie Kaufman

Richard Haass

Michael Phelps