The San Fermin running of the bulls festival became world famous with the publication of Ernest Hemingway's 1926 novel "The Sun Also Rises."
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Revelers run
Revelers run while some fall on Estafeta street beside El Pilar ranch fighting bulls, during the fourth running of the bulls at the San Fermin fiestas, in Pamplona northern Spain, Tuesday, July 10, 2012.