FILE – This April 18, 2005 file photo made available by the Vatican paper L’Osservatore Romano shows Cardinals walking in procession to the Sistine Chapel at the Vatican for the conclave to elect the successor of late Pope John Paul II, Pope Benedict XVI. Benedict XVI’s resignation on Feb. 28, 2013 sets in motion a complex sequence of events to elect the next leader of the Roman Catholic Church. The laws governing the selection after a pope’s resignation are the same as those in force after a papal death, aside from skipping a period of mourning. (AP Photo/Osservatore Romano, ho, files)