A girl holds up a photo of Pope Benedict XVI which reads “tear his face” during a protest against the World Youth Day 2011 celebrations taking place on August 17, 2011 in Madrid, Spain. Initiated by Pope John Paul II in 1985, World Youth Day youth-oriented events for the celebration of the Catholic faith are held every three years in a different country; this time in Madrid from August 16 – 21, with Pope Benedict XVI in attendance. (Photo by Denis Doyle/Getty Images)

Police try to keep the peace during a protest against the World Youth Day 2011 celebrations taking place on August 17, 2011 in Madrid, Spain. (Photo by Denis Doyle/Getty Images)

Pro (L) and anti World Youth Day supporters face off at Puerta del Sol square during a march against the papal events taking place on August 17, 2011 in Madrid, Spain. (Photo by Denis Doyle/Getty Images)

Pilgrams face off a demonstration against the World Youth Day 2011 celebrations on August 17, 2011 in Madrid, Spain. (Photo by Denis Doyle/Getty Images)

Police officers arrest a demonstrator after clashes between pilgrims and demonstratos against the visit of the Pope Benedit XVI during the World Youth Day 2011 on August 17, 2011 in Madrid, Spain. (Photo by David Ramos/Getty Images)