2011-04-27: Ice-T
2011-04-26: A.C. Grayling
2011-04-25: Rep. Ron Paul
2011-04-14: Caroline Kennedy
2011-04-13: Morgan Spurlock
2011-04-12: Ray Kurzweil
2011-04-11: Jamie Hyneman & Adam Savage
2011-04-07: Jeff Greenfield
2011-04-06: Sir David Tang
2011-04-05: James Franco
2011-04-04: Andrew Chaikin
2011-03-31: Piers Gibbon
2011-03-30: Tim Shriver
2011-03-29: Dr. Anthony Fauci
2011-03-28: Michael Moore
2011-03-24: Jody Williams
2011-03-23: Nathan Myhrvold
2011-03-22: Ayman Mohyeldin
2011-03-10: Reza Aslan
2011-03-09: David Brooks
2011-03-08: Dan Sinker
2011-03-07: Joshua Foer
