Pope Francis celebrates a mass at the Foro Italico seafront lawn in Palermo, in hommage to slain priest Pino Puglisi, as part of a visit to the Diocese of Palermo on September 15, 2018 on the occasion of the 25th anniversary of the killing by the mafia of Sicilian priest Pino Puglisi. - Pope Francis pays a one-day pastoral visit on September 15 to the Dioceses of Piazza Armerina and Palermo in Sicily, on the occasion of the 25th anniversary of the killing by the mafia of Sicilian priest Pino Puglisi. (Photo by Andreas SOLARO / AFP)