The Festival of San Fermin attracts thousands of visitors to Pamplona, Spain every year. The nine-day festival includes a carnival, bullfights and of course, the famous Running of the Bulls. Deeply traditional, it has been held since 1591, and remains a popular, if dangerous and controversial event. This year, dozens of runners and revelers have been injured, and one has been killed - a 27-year-old man who was gored in the neck, heart and lungs on Friday. Animal rights groups continue to level criticism toward the event, in which dozens of bulls run through small, packed streets toward a bullring where they will be killed during later bullfights. Collected here are some of the scenes from this year's Festival of San Fermin.