• Author Dennis Lehane joined to talk about his reaction to the Boston Marathon bombing.
  • Emily Rooney talked to Jim and Margery about the ongoing investigation.
  • Patrick Chagnon, President of Blueline Risk Mitigation Group, talked about making communities safer in the wake of attacks.
  • Dr. Michael Zinner of Brigham and Women's Hospital talked about his hospital's emergency efforts.
  • Global Post's Charlie Sennott put the Boston bombing in an international context.
  • Dan Ariely talked about gun reform and the public's waning interest in passing gun laws.
  • The Takeaway's Todd Zwillich joined from Washington D.C.
  • Brian McGrory from the Boston Globe talked about trying to identify the bombing suspect.