New York Times culture reporter Dave Itzkoff on his new best selling biography of Robin Williams entitled, "Robin." Comedians Aaron Berg, Joe DeVito, Jackie "The Joke Man" Martling, and Dr. Jay Sutay, the hardest working pediatrician in comedy. Also Howie Klein from Down With Tyranny. Professor Corey Brettschneider is the author of "The Oath And The Office: A Guide To The Constitution For Future Presidents." Emil Guillermo is an awarding winning journalist who hosts "The PETA Podcast."