Marcus Luttrell

Decorated Navy SEAL & Bestselling Author of "Lone Survivor"

John Stossel

Emmy-Award Winning Journalist

Sean Astin

Actor, Director, Voice Artist & Producer Known For "Lord of the Rings"

Malaak Compton

Activist & Philanthropist

Garry Kasparov

World Champion Chess Expert & Strategist; Chairman of the Human Rights Foundation based in New York

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Bethany Hamilton

Professional Surfer & Shark Attack Survivor; Inspiration for the Film "Soul Surfer"

Nick Vujicic

Motivational Speaker, NY Times Best-Selling Author, Founder & CEO of Life Without Limbs

Deborah Norville

Two-Time Emmy Award-Winning Journalist; Anchor of "Inside Edition" & Best-Selling Author

Mark Spitz

Legendary Olympic Swimmer; Third Athlete to Win Nine Olympic Gold Medals

Mark Spitz on the 1972 Olympic Games in Munich

Judge Greg Mathis

Civil Rights Activist, Television Personality

Ice-T

Rapper, Record Producer & Actor Known for "Law & Order: SVU"

Ken Dychtwald

Founder & CEO of Age Wave; Gerontologist & Expert on Aging-Related Issues

Mark Sanborn

Leadership, Teamwork & Performance Expert; New York Times Bestselling Author; President of Sanborn & Associates

Nastia Liukin

Olympic Gold Medal Gymnast

Jonah Lehrer

Neuroscientist, New York Times bestselling author of "Imagine: How Creativity Works"

Jackie Joyner-Kersee

Olympic Legend, Philanthropist, American Record-Holder in the Long Jump & Founder of the Jackie Joyner-Kersee Foundation

Dan Ariely

Behavioral Economist; Professor at Duke University; Author; Founding Member of The Center for Advanced Hindsight

Joe Torre

Chief Baseball Officer for Major League Baseball; National Baseball Hall of Famer, 4-Time World Series Champion & 9-Time MLB All-Star

Jeffrey Tambor

Emmy Award-Winning Actor of "Arrested Development," "The Hangover" & "Transparent"