SYDNEY, AUSTRALIA – JULY 20: Pilgrims attend the Final Mass at Southern Cross Precinct during World Youth Day Sydney 2008 on July 20, 2008 in Sydney, Australia. Organised every two to three years by the Catholic Church, World Youth Day (WYD) is an invitation from the Pope to the youth of the world to celebrate their faith. The celebration, being held in Sydney from July 15, 2008 to July 20, 2008, will mark the first visit of His Holiness Pope Benedict XVI to Australia. (Photo by World Youth Day)