Two nuns attend a mass at the Chapel of the Apparitions in the Fatima Sanctuary Thursday, May 11 2017, in Fatima, Portugal. Pope Francis is visiting the Fatima shrine on May 12 and 13 to canonize two Portuguese shepherd children whose "visions" of the Virgin Mary 100 years ago turned the sleepy farming town of Fatima into a major Catholic pilgrimage site. (AP Photo/Paulo Duarte), APTOPIX