VATICAN CITY (RNS) It took a split second for him to realize what happened.As Pope Francis leaned forward to give Estella Westrick a kiss on the cheek as he greeted the faithful on St. Peter’s Square, the 3-year-old from Georgia caused a sensation by reaching up and yanking his white skullcap, or zucchetto, off his head. The Pope broke out into good-humored guffaws when he realized what had happened. And video of the encounter went viral on social media.