MADRID – Pope Benedict XVI urged more than 1.5 million young people to become missionaries for the faith Sunday, giving them words of encouragement as he concluded a glitch-marred church youth festival and announced that the next edition will be in Rio de Janeiro in 2013.

Benedict told the pilgrims at a Madrid airfield hosting World Youth Day that they should not keep their faith private but participate fully in the life of their parishes and remain in communion with the church.

“So do not keep Christ to yourselves! Share with others the joy of your faith,” he said.

Despite the discomfort from fierce thunderstorms, pilgrims who spent the night in sleeping bags, tents and under tarps seemed unfazed as they awoke to sunny skies Sunday.

“The night was amazing, I didn’t sleep at all,” said Adrinna Wista, a 21-year-old Polish pilgrim.

“We stayed the night chatting, meeting new people and praying with them. Amazing.”