In this image released by Brazil's Presidential Press Office, Pope Francis, left, walks Brazil's President, Dilma Rousseff upon his arrival at the Galeao international airport in Rio de Janeiro, Brazil, Monday July 22, 2013. Francis, the 76-year-old Argentine who became the church's first pontiff from the Americas in March, returns to the embrace of Latin America to preside over the Roman Catholic Church's World Youth Day festival. Church official at center is unidentified. (AP Photo/Brazil's Presidential Press Office-Roberto Stuckert Filho)