Pope Francis waves to worshippers upon his arrival to lead an open-air mass in the Manger Square on May 25, 2014, outside the Church of the Nativity in the West Bank Biblical town of Bethlehem. Pope Francis invited Israeli President Shimon Peres and his Palestinian counterpart Mahmud Abbas to his home in the Vatican for a "heartfelt prayer" for peace. AFP PHOTO/POOL/Fadi Arouri