Pope Francis smiles as Rev. Federico Lombardi, outgoing Vatican spokesperson, right, cuts a cake for his retirement on board the flight from Krakow, Poland, to Rome, at the end of his 5-day trip to southern Poland for the World Youth Days, Sunday, July 31, 2016. Francis announced the next World Youth Day will take place in Panama in 2019. (Filippo Monteforte/Pool Photo via AP)