Tens of thousands of people filled St. Peter's Square to welcome Pope Francis, the first Latin American pontiff, to celebrate his inaugural Mass in front of numerous heads of state from around the world. Pope Francis rode around the square in an open-air jeep as he waved and kissed babies along the way. The pope exited the jeep at one point to bless a man who was in a wheelchair. Speaking at his inaugural Mass, Francis reflected on Joseph, whom Catholics consider a saint, and his responsibilities in protecting Jesus and Mary, and said such responsibility extends to the pope himself. Rome, ITALY - 19/03/2013