Louis C.K.

Harry Frankfurt

Gov. Mike Huckabee

Peter O'Toole

Josh Bernstein

Michael Oren

Robin Wright Penn

Gen. Rupert Smith

Terry McAuliffe

Scott McClellan

Sen. Charles Schumer

Bill Gates

Neil deGrasse Tyson

Sen. Joe Biden

Sienna Miller

Walter Scheib

Mike Rowe

Ralph Nader

John Mellencamp

Jeffrey Rosen

Christopher Horner

Ishmael Beah

Meredith Vieria

Craig Newmark

John Amaechi

Jake Gyllenhaal

Sam Sheridan

Bob Woodruff

Dr. Richard Jadick

Wynton Marsalis

Dr. Sharon Moalem

Senator Chris Dodd

John Waters

Zbigniew Brzezinski

Sandra Bullock

Stephen Prothero

John Bolton

Chris Hansen

Don Cheadle

Senator John Kerry

Dennis Miller

Bill Richardson

Philip Zimbardo

Bill Bradley

Walter Isaacson

Halle Berry

Richard Preston

Andrew Card

Sig Hansen

Ali Allawi

Jeremy Scahill

Matt Cooper

Senator John McCain

Garry Shandling

Richard Gere

Christopher Hitchens

Tobey Maguire

Pierre Rehov

Ted Koppel

Lee Gutkind

George Tenet

Michael Beschloss

Reza Aslan

Jeremy Paxman

Tim Russert

Don Rickles

Brink Lindsey

Zaki Chehab

Margaret Spellings

Lt. Col. Kevin Robbins

Al Gore

Rep. Ron Paul

Paul Rudd

Michael Barone

Eddie Izzard

David Steinberg

Bob Shrum

Allan Brandt

Angelina Jolie

Steve Carell

Brian Williams

Fareed Zakaria

Greg Bear

Steve Vogel

Bruce Willis

Michael Moore

Claire Danes

Josh Rushing

Christopher Walken

Matt Groening

Adam Sandler

Neil deGrasse Tyson

Robert Pallitto

Rob Gifford

Robert Dallek

Alastair Campbell

Lewis Gordon Pugh

Jed Babbin

Matt Damon

Andy Samberg

Sen. Joe Biden

Tal Ben-Shahar

Bill Kristol

Denis Leary

Stephen F. Hayes

Sen. John McCain

Nikolas Kozloff

Alan Weisman

Sen. Barack Obama

Lt. Col. John Nagl

Jeff Garlin

Jodie Foster

Robert Draper

Douglas Farah

Alan Greenspan

Gen. Wesley Clark

Bill Clinton

John Bowe

Evo Morales

Jamie Foxx

Ken Burns

Jack Cafferty

Chris Matthews

Ted Koppel

Jack Goldsmith

Vicente Fox

Tiki Barber

Lynne Cheney

Howard Kurtz

Tony Snow

Meryl Streep

Jake Gyllenhaal

Ben Affleck

Michael Gerson

Valerie Plame Wilson

David Wright

Jerry Seinfeld