Children gesture as Pope Francis celebrates a giant open-air mass at the University of Nairobi on November 26, 2015. Pope Francis landed in Kenya's capital Nairobi on November 25 on the first leg of a landmark trip to Africa, with huge crowds, choirs and dancers waiting to greet him. The 78-year-old pontiff, the third pope to visit the continent, is also scheduled to visit Uganda and the troubled Central African Republic (CAR) on a six-day trip. AFP PHOTO / GIUSEPPE CACACE