Ritual, symbol, popemobile tour to mark Pope Leo XIV's installation Mass

Pope Leo XIV will begin his reign this Sunday. The ceremony will occur at Vatican City. Presidents and dignitaries will attend the event. Leo will tour St Peter's Square in the popemobile. He will receive the pallium and fisherman's ring. The event will include a Mass. Security will be tight. Rome expects 250,000 attendees. Giant screens will broadcast the event.