TOPSHOTS A Malaysia flag flutters as Catholic faithfuls carry the World Youth Day (WYD) Cross that in 1984 Pope John Paul II entrusted the youth of the world, to the stage before the start of the WYD opening mass, at Copacabana beach in Rio de Janeiro, Brazil, on July 23, 2013. The highlight of the landmark visit of Pope Francis to the world's most populous mainly Catholic country will be WYD, a five-day event that kicks off today. Pope Francis's popularity on his Latin American home turf posed a challenge to Brazilian authorities Tuesday after adoring crowds mobbed his car on his arrival on Monday. AFP PHOTO / TASSO MARCELO