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Running of the bulls in Pamplona, Spain

Thrill-seekers test their bravery by dashing alongside fighting bulls through the streets of the northern Spanish city of Pamplona during the running of the bulls.

Every morning during the festival, six bulls specifically bred for fighting race through the narrow, medieval streets of Pamplona accompanied by an equal number of large steers — each wearing a clanking cowbell — tasked with keeping the pack tight and galloping at an even pace.

The run covers 930 yards from a holding pen on the edge of town to the central bull ring, where the large animals face matadors  in afternoon bullfights.