During World War II, many Allied pilots failed to complete their missions over the Italian town of San Giovanni Rotondo. It seemed a Franciscan friar flying through the sky was staying their hands, preventing them from dropping their bombs. One aviator after the other testified to this otherworldly phenomenon, corroborating one another’s incredible tale of supernatural intervention in the midst of battle. The friar, of course, was Padre Pio of Pietrelcina — now St. Pio, whose feast the Church celebrates on Sept. 23. And the story, of course, is private revelation; Catholics are free to believe or disbelieve its veracity...