Trevor Kletz, OBE, D.Sc., F.Eng. (1922-2013), was a process safety consultant, and published more than a hundred papers and nine books on loss prevention and process safety, including most recently Lessons From Disaster: How Organizations Have No Memory and Accidents Recur and Computer Control and Human Error. He worked thirty-eight years with Imperial Chemical Industries Ltd., where he served as a production manager and safety adviser in the petrochemical division, also holding membership in the Department of Chemical Engineering at Loughborough University, Leicestershire, England. He most recently served as senior visiting research fellow at Loughborough University, and adjunct professor at the Mary Kay O'Connor Process Safety Center, Texas A&M University. Since 2011 Dr. Paul Amyotte, P.Eng. has held the C.D. Howe Chair in Process Safety at Dalhousie University, where he is also a Professor of Chemical Engineering. Dr. Amyotte's research and practice interests are in industrial safety and loss management, particularly in the areas of process safety and inherently safer design (ISD). He is an expert in the prevention and mitigation of dust explosions. He has written a book with us entitled An Introduction to Dust Explosions, and wrote the second edition of Process Plants: A Handbook for Inherently Safer Design in conjunction with Trevor Kletz. He has published or presented approximately 300 research papers, and is the editor of the Journal of Loss Prevention in the Process Industries. He is also a Past-President of the Canadian Society for Chemical Engineering, Engineers Nova Scotia, and Engineers Canada. Dr. Amyotte leads a comprehensive research team of undergraduate and graduate students as well as postdoctoral fellows working to advance process safety practice worldwide.