Pope Francis encouraged hundreds of thousands of young people at a global gathering of the faithful Sunday to "believe in a new humanity" that is stronger than evil and refuses to see borders as barriers. His appeal came at the end of World Youth Day, a weeklong event being held in southern Poland this year that draws young Catholics from around the world every two to three years for a spiritual pep rally. The youth gathering was Francis' main focus during his pilgrimage to Poland, but over five days in this deeply Catholic nation he also prayed at the former...