Matthew Bunn, Co-Principal Investigator for the Project on Managing the Atom, Laura Holgate, Senior Director at the National Security Council, and Samantha Pitts-Kiefer, Senior Program Officer at the Nuclear Threat Initiative, discussed how to prevent nuclear terrorism at a panel moderated by Gary Samore, Executive Director for Research at the Harvard Kennedy School Belfer Center. Conversation covered the goals of the summit, the largest challenges regarding nuclear terrorism, and current relevant events.