Worshiper Ernesto Tirado (C) prays and sings at the evangelical Church of Jesus Christ is Love in a Buenos Aires suburb February 18, 2007. In Argentina and across Latin America, the Catholic Church is finding it hard to compete with churches like this one, and the dwindling Catholic flock will be high on the agenda when Pope Benedict meets bishops during a visit to Brazil in May. Catholics acknowledge that the future of their church lies in Latin America -- home to half the world's 1 billion Catholics. But what was once a virtual monopoly has been steadily challenged, not only in countries like Brazil and Guatemala, but also in more staid places like Argentina. Picture taken February 18, 2007. TO MATCH FEATURE ARGENTINA-CHURCH/ REUTERS/Enrique Marcarian (ARGENTINA)