Pope Francis (C-L) is welcomed by Abu Dhabi's Crown Prince Sheikh Mohammed bin Zayed Al-Nahyan (C-R) upon his arrival at Abu Dhabi International Airport in the UAE capital on February 3, 2019. - Pope Francis heads to the UAE on February 3 for the first ever papal visit to the Arabian Peninsula, birthplace of Islam, where he will hold an open-air mass for tens of thousands of Catholics. (Photo by Andrew Medichini / POOL / AFP)