By MICHAEL WEISSENSTEIN and NICOLE WINFIELD, Associated Press
SILAO, Mexico (AP) - Pope Benedict XVI worked to build the future of Mexico's church by reaching out to children Saturday as tens of thousands of teenagers streamed into a vast, shade-starved park to camp out overnight ahead of a gigantic papal Mass.
Benedict awoke to the pre-dawn serenade of two dozen youths from a Guadalajara church group who sang him a traditional folk song after getting as close as security would allow to the college in Leon where the pontiff is staying during his three-day visit to Mexico.
"We sang with all our heart and all our force," said Maria Fernanda de Luna, a member of the group. "It gave us goose bumps to sing 'Las Mananitas' for him."
Benedict has taken up Pope John Paul II's drive to reach out to young Roman Catholics, following in his footsteps by rallying millions of young faithful to join him for World Youth Days, the Catholic youth festivals held once every three years. The next edition is scheduled for Rio de Janeiro next year.
His only public remarks Saturday were planned for a meeting with about 4,000 children in Peace Plaza in the city of Guanajuato. He was expected to refer again to the need for them to stay away from the drug-fueled violence that wracks Mexico.
"We young people are getting closer to the church and to God, instead of getting closer to drugs and violence," said Juan Daniel Pacheco, 18, of Apaseo el Grande in Guanajuato state as he sought shade with his friends at one of the campgrounds that were quickly filling with faithful arriving for Sunday's Mass. "We are young people who will be able to change Mexico."
The focus on youth fits with the Vatican's drive to re-evangelize parts of the world where Catholicism has fallen by the wayside, trying to rally the next generation to embrace a faith that their parents may have abandoned. While Europe has certainly been Benedict's focus to date, Mexico also has seen its number of Catholics fall.
"The Mexican church feels like it's lost a few generations of Catholics," said Joseph Palacios, a professor of Latin American studies at Georgetown University, citing the battles over liberation theology that drove many left-leaning Catholics away. To get back its numbers, the Mexican church is "moving forward with the new generation," he said.
Yet as much as Benedict was receiving a rapturous welcome from young Catholics, his first full day in Mexico was not without criticism - particularly concerning the church's treatment of children and sexual abuse.
On the second day of the pope's visit, victims of Marcial Maciel launched a new book containing documents on the Vatican's alleged cover-up of sexual abuse of seminarians by Maciel, the founder of the Legionaries of Christ.
Alberto Athie, former priest and one of three co-authors of "The Desire Not to Know," called on Benedict to publicly recognize the church's responsibility for Maciel's abuse.
"The church won't fall. On the contrary, it will be reconstructed," he said.
Of the 43.5 million Mexicans under age 20, 36.2 million are Catholic, or 83.2 percent, just under the national average. The largest group of Mexicans overall are children aged 5 to 9 - a prime target for Benedict's efforts to rebuild a church that has fallen victim to the same secular trends that have emptied churches across Europe.
Benedict will greet tens of thousands more on Sunday, when he celebrates Mass in the enormous Bicentennial Park.
Despite the heat, a festival atmosphere prevailed as thousands of Mexican teens streamed out of buses from across the country to set up camp at the park, many singing or playing guitars to the tune of the song "La Bamba," with the lyrics slightly changed: "Para ver al Papa, se necesita una poca de gracia." ("To see the pope, you need some grace")
The weeklong trip to Mexico and Cuba is Benedict's first to both countries, and only his second to Latin America. He visited Brazil in 2007.
Many said the pope's message of peace and unity would help heal their country, traumatized by the deaths of more than 47,000 people in a drug war that has escalated during a government offensive against cartels that began at the end of 2006.