Graham Allison

Founding dean of Harvard's modern John F. Kennedy School of Government and Director of the Belfer Center for Science and International Affairs.

Ted Allen

Host, "Chopped," Contributor, "The Best Thing I Ever Ate"

Mark Allen

Six-Time Ironman Triathlon World Champion

Marcus Allen

Heisman Trophy Winner; Set 12 NCAA records at USC

David Allen

Bestselling Author & Founder of The David Allen Company

Buzz Aldrin

Former Fighter Pilot & 2nd Man to Walk on the Moon; Author

Marv Albert

TNT & CBS Sports Commentator, Five-time Emmy Award Winner, Named Sportscaster of the Year by the American Sportscasters Association

Danny Ainge

CEO of the Utah Jazz & Former President of the Boston Celtics

David Agus

Co-Founder of Navigenics, Author of "The End of Illness" & Host of "The Checkup with Dr. David Agus"; Professor of Medicine & Engineering at the University of Southern California

The Book of Animal Secrets

Clay Aiken

Singer-Songwriter, Runner Up on FOX's "American Idol" & North Carolina Politician

Blaise Agüera y Arcas

Leading AI Researcher, Works on Machine Intelligence at Google; Former Architect of Bing Maps and Bing Mobile

Ubi Sunt

Scott Adams

Creator of the Popular Comic Strip "Dilbert", Chief Strategy Officer for WhenHub & Author

Dan Abrams

Chief Legal Affairs Anchor at ABC News & Founder of Abrams Media

General John Abizaid

Retired U.S. Army General & Former U.S. Central Command Commander

Paula Abdul

American Singer-Songwriter, Dancer, Choreographer & TV Personality

Donovan Bailey

Hall of Fame Track & Field Legend