Pope Francis delivers his speech at an International peace conference, in Cairo, Egypt, Friday, April 28, 2017. Pope Francis is on a two-day pilgrimage to Egypt aimed at lifting the spirits of Christians in the Middle East, whose numbers have rapidly dwindled in recent decades due to war, displacement and emigration. Sitting at right, Sheikh Ahmed el-Tayeb, Grand Imam of Al-Azhar, the pre-eminent institute of Islamic learning in the Sunni Muslim world, listens. (AP Photo/Amr Nabil), APTOPIX