https://chieforganizer.org/wp-content/uploads/2020/05/CN05312020.mp3Podcast: Play in new window | DownloadSubscribe: Apple PodcastsPearl River     Riots are often studied, but little understood.  They are unpredictable by definition.  Why does a riot erupt in one place, but not another when the combustible conditions for a conflagration seem to exist in both?  How does a peaceful protest one-minute cross the line into …