VATICAN CITY, VATICAN - DECEMBER 25:  Swiss guards attend the Pope Francis'  'Urbi et Orbi' blessing message in St Peter's Square on December 25, 2015 in Vatican City, Vatican. During his Christmas message Pontiff Sayd ' My thoughts turn to those affected by brutal acts of terrorism, particularly the recent massacres which took place in Egyptian airspace, in Beirut, Paris, Bamako and Tunis.  (Photo by Franco Origlia/Getty Images)