People visit St Peter's Square on the second day of the conclave

Robert Francis Prevost became the first pope from the United States on Thursday, picking the papal name Leo XIV after cardinals from around the world elected him leader of the world's 1.4 billion Catholics. Tens of thousands of people packed in St Peter's Square cheered as Prevost appeared on the balcony of St Peter's Basilica, waving with both hands, smiling and bowing. The new pope will likely do a tour of St Peter's Square in his popemobile for the first time, before delivering a homily, outlining his priorities.