Benedict XVI marked the 50th anniversary of Pope John XXIII's celebrated "speech to the moon" last night at the end of a candlelit procession from Castel Sant’Angelo to St Peter’s Square (full text and video). Fr Alvaro Corcuera, director general of the Legion of Christ and Regnum Christi, has announced that he is stepping down for health reasons (full text, video). Joe Biden and Paul Ryan discussed how their Catholic faith informs their position on abortion during the US vice-presidential debate last night (transcript, video). The American bishops have urged parishes not to sing variations on the Agnus Dei at Masses following a ruling by the Vatican Congregation for Divine Worship (full text). Steve Harmon offers a Baptist view of the Second Vatican Council. Fr John Zuhlsdorf unearths newsreel footage of the opening of Vatican II. And the BBC's Chloe Arnold tells the story of Sister Colette, a recently deceased French nun whose life "speaks volumes about the vast, enigmatic nation of Algeria". Follow me on Twitter @lukecoppen for updates throughout the day.