Bull runners lead the herd of fighting bulls to Pamplona's arena after the fourth run through the town July 10 during the centuries-old fiesta made internationally famous by Ernest Hemingway's book "The Sun Also Rises", published in the 1920's. The fiesta is best known for its "encierros", or running-of-the-bulls, which take place each morning during the week-long fiesta.

DB/KM