Why they run with the bulls in Pamplona

The annual running of the bulls in Pamplona begins tomorrow, July 7, and continues until July 14. But how did they start doing that in the first place? I explain in this article at Las dos Castillas e-zine.

http://lasdoscastillas.net/why-they-run-with-the-bulls-in-pamplona-by-sue-burke/