Erik Vanmarcke, Professor of Civil and Environmental Engineering and Associated Faculty with the Princeton Environmental Institute; Alexander Glaser, Assistant Professor of Mechanical and Aerospace Engineering and International Affairs, Woodrow Wilson School; M.V. Ramana, Associate Research Scholar with the Nuclear Futures Laboratory and the Program on Science and Global Security, Woodrow Wilson School; and Frank von Hippel, Professor of Public and International Affairs, Woodrow Wilson School. Introductions by Hal Feiveson *72, Senior Research Policy Analyst, the Program on Science and Global Security, and Lecturer in Public and International Affairs, Woodrow Wilson School and Christina Paxson, Dean of the Woodrow Wilson School and Hughes-Rogers Professor of Economics and Public Affairs. Panelists assess the 2011 Japanese earthquake and the resulting nuclear crisis at Fukushima from various perspectives: the cause and progression of events responsible for the crisis, its resulting safety lessons, and the overall impact on ensuring the safety of existing nuclear reactors.