ABC News' Ines De La Cuetara takes us to Pamplona, Spain, as she talks to bull runners about why the partake in the infamous Running of the Bulls each morning at the centuries-old San Fermín festival.

Every year, thousands of people line the medieval streets of Pamplona to witness the centuries-old tradition of running with bulls. Many watch from balconies and wooden barricades along the course.

Five runners have been taken to hospital after the sixth bull run at the San Fermin festival in Pamplona, Spain. One participant was knocked unconscious by a bull inside the ring at the end of the ...