Pope Francis incenses the altar during the World Youth Day's closing Mass at Copacabana beach in Rio de Janeiro, Sunday, July 28, 2013. An estimated 3 million people poured onto Rio's Copacabana beach on Sunday for the final Mass of Francis' historic trip to his home continent, cheering the first Latin American pope in one of the biggest turnouts for a papal Mass in recent history. (AP Photo/Domenico Stinellis)