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Insider threats are the most serious challenge confronting nuclear facilities in today's world, according to a report by Matthew Bunn of Harvard University and Scott Sagan of Stanford University. In every case of theft of nuclear materials where the circumstances of the theft are known, the perpetrators were either insiders or had help from insiders. In Worst Practices Guide to Insider Threats: Lessons from Past Mistakes, published by the American Academy of Arts and Sciences, Bunn and Sagan offer some advice and insights based on lessons learned from past insider incidents at nuclear facilities in the United States and around the world. The report is part of a larger MacArthur-supported study that aims to apply lessons from the insider threat in other industries, such as the diamond industry, to improve security at nuclear facilities and prevent nuclear weapons proliferation.  

International Peace & Security, Peace & Security, Research