Pope Francis greets Al-Azhar's Grand Imam Ahmed al-Tayeb during a meeting at Cairo, Egypt April 28, 2017. REUTERS/Mohamed Abd El-Ghany - RTS14CR4
Christian clerics walk past security forces during Pope Francis' visit in Cairo, Egypt April 28, 2017. REUTERS/Mohamed Abd El Ghany - RTS14D0D
Members of the Coptic clergy attend a mass, ahead of Pope Francis' visit, in a church in Cairo, Egypt April 28, 2017. REUTERS/Amr Abdallah Dalsh TPX IMAGES OF THE DAY - RTS14AHR
A guest is pictured during a meeting with Pope Francis and Al-Azhar's Grand Imam Ahmed al-Tayeb at the Al-Azhar International peace conference at Cairo, Egypt April 28, 2017. REUTERS/Alessandro Bianchi - RTS14CUK
Pope Francis attends with Al-Azhar's Grand Imam Ahmed al-Tayeb (unseen) during Al-Azhar International peace conference at Cairo, Egypt April 28, 2017. REUTERS/Alessandro Bianchi - RTS14CQF
A guest uses mobile phone during a meeting with Pope Francis and Al-Azhar's Grand Imam Ahmed al-Tayeb at the Al-Azhar International peace conference at Cairo, Egypt April 28, 2017. REUTERS/Alessandro Bianchi - RTS14CTZ
Pope Francis (C) walks with Egypt's President Abdel Fattah al-Sisi (2nd R) during their meeting in Cairo, Egypt April 28, 2017. REUTERS/Amr Abdallah Dalsh - RTS14DIE
Pope visits Egypt
On a two-day visit to Egypt, Pope Francis urged Muslim leaders to unite in renouncing religious extremism at a time when Islamist militants are targeting ancient Christian communities across the Middle East.