Pope Francis, stands at the palace entrance, flanked by Crown Prince Sheikh Mohammed bin Zayed Al Nahyan, right, and Sheikh Mohammed bin Rashid al Maktoum, left, on the occasion of an official welcome ceremony at the Presidential Palace, in Abu Dhabi, United Arab Emirates, Monday, Feb. 4, 2019. Francis has arrived at the presidential palace to officially start his historic visit to the United Arab Emirates as canons boomed and a military aircraft flew over trailing the yellow and white smoke of the Holy See flag. (AP Photo/Andrew Medichini)