In this photo released by the Vatican's L'Osservatore Romano newspaper, Pope Benedict XVI, left, looks on with Washington's new ambassador Mary Ann Glendon, before receiving her credentials at the Vatican, Friday Feb. 29, 2008. The pontiff told Glendon  that he appreciates efforts by what he said are the many Americans opposed to abortion, euthanasia and gay marriage. He welcomed the American people's "historic" appreciation of the role of religion in shaping public policy. Mary Ann Glendon, a Harvard law professor and anti-abortion scholar, has taken up the post as ambassador to the Holy See just six weeks before Benedict's first trip to United States. AP Photo logo AP Photo 23 months ago

In this photo released by the Vatican's L'Osservatore Romano newspaper, Pope Benedict XVI, left, looks on with Washington's new ambassador Mary Ann Glendon, before receiving her credentials at the Vatican, Friday Feb. 29, 2008. The pontiff told Glendon that he appreciates efforts by what he said are the many Americans opposed to abortion, euthanasia and gay marriage. He welcomed the American people's "historic" appreciation of the role of religion in shaping public policy. Mary Ann Glendon, a Harvard law professor and anti-abortion scholar, has taken up the post as ambassador to the Holy See just six weeks before Benedict's first trip to United States.