CAIRO, EGYPT - JANUARY 06:  Egyptian President Abdel Fattah al-Sisi (C) attends a Christmas Eve mass led by Egyptian Coptic Pope Tawadros II (L) at the St. Mark's Coptic Orthodox Cathedral in the Abbassia District of Cairo, Egypt on January 6, 2015. (Photo by Ahmed Gamel/Anadolu Agency/Getty Images)