• Columbine, Sandy Hook, Fort Hood, and now Isla Vista — how do we prevent mass tragedies? Jim Braude and Margery Eagan looked at whether better attention to mental health or stricter gun laws would prevent these mass killings.
  • Boston Globe editor Brian McGrory discussed the guilty plea of Jared Remy in the death of his former girlfriend Jennifer Martel.
  • GlobalPost cofounder and editor-at-large  Charlie Sennott  talked to Jim and Margery about US power and Pres. Obama's West Point speech Wednesday, as well as youth employment worldwide. Charlie Sennott is also the founder of the GroundTruth project.
  • Sheila Heen — lecturer at Harvard Law School — joined Jim and Margery to talk about the new book she co-authored with Douglas Stone, Thanks for the Feedback: The Science and Art of Receiving Feedback Well . For more on the book, visit Stone and Heen's website . 
  • Filmmaker Errol Morris joined Jim and Margery in Studio Three to talk about his new documentary about Donald Rumsfeld,  The Known Unknown . For more head to Errol Morris' website .