36. For a complete conceptual analysis of the 1996 Mount Everest tragedy, see M. Roberto. (2002). “Lessons from Everest: The interaction of cognitive bias, psychological safety, and system complexity,” California Management Review. 45(1): 136–158. For educators, the events also are detailed in a teaching case; see M. Roberto and G. Carioggia. (2002). “Mount Everest—1996,” Harvard Business School Case No. 303-061.