Revelers cover their faces when tear gas is released from an unknown source prior to the second bull run of the San Fermin fiestas on Thursday, July 8, 2010, in Pamplona, Spain. (AP Photo/Victor R. Caivano)
A runner, top left, touches a bull as revelers run along with Penajara ranch fighting bulls during the San Fermin fiestas on Wednesday, July 7, 2010, in Pamplona, Spain. (AP Photo/Victor R. Caivano)
A boy from El Salvador waits with his parents the run of the Penajara ranch fighting bulls during the San Fermin fiestas on Wednesday, July 7, 2010, in Pamplona, Spain. (AP Photo/Victor R. Caivano)
People wait on balconies over Estafeta street for the run of the Penajara ranch fighting bulls during the San Fermin fiestas on Wednesday, July 7, 2010, in Pamplona, Spain. (AP Photo/Victor R. Caivano)
A reveler, right, looks over the crowd at Consistorial square during the 'Chupinazo,' the official opening of the 2010 San Fermin fiestas on Tuesday, July 6, 2010, in Pamplona, Spain.(AP Photo/Victor R. Caivano)
Revelers hold up traditional red neckties during the 'Chupinazo,' the official opening of the 2010 San Fermin fiestas on Tuesday, July 6, 2010, in Pamplona, Spain. (AP Photo/Victor R. Caivano)
A reveler jumps from the Plaza de la Navarreria fountain during the first day of the San Fermin fiestas on Tuesday, July 6, 2010, in Pamplona, Spain. (AP Photo/Victor R. Caivano)
A band parades through the crowd during the 'Chupinazo,' the official opening of the 2010 San Fermin fiestas on Tuesday, July 6, 2010, in Pamplona, Spain. (AP Photo/Victor R. Caivano)
Water is poured on revelers, from the balconies during the 'Chupinazo,' the official opening of the 2010 San Fermin fiestas on Tuesday, July 6, 2010, in Pamplona, Spain. The fiestas 'Los San Fermines,' held since 1591, attracts tens of thousands of foreign visitors each year for nine days of revelry, morning bull-runs and afternoon bullfights. (AP Photo/Victor R. Caivano)
