'I'm just a pilgrim,' Benedict XVI says in public farewell

Rome (CNN) -- Benedict XVI's time as pope came to a historic end Thursday, as he became the first pontiff in six centuries to resign as leader of the world's Roman Catholics, who now number 1.2 billion. - 'I'm just a pilgrim,' Benedict XVI says in public farewell
Benedict XVI pledges 'unconditional obedience' to new pope