Pope Francis makes his way through a crowd of thousands of pilgrims, to celebrate his inaugural mass.<br/> <br />The new pope's outgoing nature and sense of humour differ notably from the much more formal Benedict, who last month became the first pope in 600 years to resign.<br/> <br />In another sign of the informality, Francis abandoned the bullet-proof popemobile frequently used by his predecessor.<br/> <br />Vatican-watchers expect Pope Francis to send further signals of change by using a simpler liturgy than the retired Benedict, who preferred a more Baroque style.<br/> <br />Up to one million people are expected to join the celebration in St. Peter's square, including religious and political leaders from around the world.<br/> <br />Maureen Ferguson, a senior policy advisor to the Catholic Association of America, said she was very positive about the new papacy.<br/> <br />(SOUNDBITE) (English) SENIOR POLICY ADVISOR, THE CATHOLIC ASSOCIATION, MAUREEN FERGUSON, SAYING:<br/> <br />"I think Pope Francis is going to be
