Gary Hirshberg

Co-Founder & Chief Organic Optimist of Stonyfield Farm

Jim Whitehurst

Former President of IBM & CEO of Red Hat

Tiffany Shlain

Founder of The Webby Awards; Emmy-Nominated Filmmaker, Bestselling Author, Internet Pioneer & Futurist

Madeline Levine

Educator & Author of The Price of Privilege

George P. Bush

Politician & Land Commissioner of Texas

Josh Klein

Hacker & Author of "Hacking Work"

Rye Barcott

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

Ralph Nader

Consumer Advocate, Lawyer & Author; Former Independent Presidential Candidate

Juan Williams

New York Times Best-Selling Author, Fox News Political Analyst, Co-Host of "The Five" & Award-Winning Columnist

Ron Shaich

Managing Partner of Act III Holdings; Founder & Former CEO of Panera Bread Company

How the Founder of Panera Turned Around the Struggling Brand | Inc.

Vernice "FlyGirl" Armour

America’s First Black Female Combat Pilot, Former Marine & Cop; Author of "Zero to Breakthrough”

Creating the Breakthrough

Cal Ripken, Jr.

President & CEO Ripken Baseball, Inc.; Baseball "Ironman" and Legendary Shortstop from the Baltimore Orioles

Bill Parcells

Former NFL Head Coach & Pro Football Hall of Fame Inductee

Deval Patrick

Two-term Governor of Massachusetts, Civil Rights Attorney & Business Leader

Drew Houston

Co-Founder & CEO of Dropbox

Ellen Kullman

CEO of Carbon, Former Chair & CEO of DuPont & Former Director of General Motors

Tim Tebow

ESPN College Football Analyst; Heisman Trophy Winner; Former Quarterback for NFL's Denver Broncos & Baseball Outfielder for the New York Mets

Julianna Margulies

Emmy Award-Winning Actress & Producer; Best Known for Her Role in "The Good Wife"

Bill Clinton

42nd President of the United States; Founder of the William J. Clinton Foundation

Dick Costolo

Former CEO of Twitter and Co-Founder of Feedburner