Friday, March 20, 2015.  Twenty years ago today, a group of religious cultists carried out an attack using sarin nerve gas on the Tokyo subway system.  This attack killed at least a dozen people and injured thousands.  The leader of the Aum Shinrikyo cult, along with many of his followers, are on Japan's death row and could be executed as soon as next month.

I talk about my reactions to the gas attack twenty years ago, and consider why those reactions haven't changed much in the twenty years that have passed.  I also consider why we need to remember events like this, as much as our human nature might drive us to forget.