Britain's Queen Elizabeth II, left, walks with Pope Benedict XVI as they leave the Palace of Holyroodhouse in Edinburgh, Scotland, following his formal welcome on the first day of his four day visit to Britain, Thursday Sept. 16, 2010. Prince Philip following behind left and Pope's personal secretary Gerog Gaenswein, behind right. Pope Benedict XVI, beginning a controversial state visit to Britain, acknowledged Thursday that the Catholic Church failed to act decisively or quickly enough to deal with priests who rape and molest children. (AP Photo / Dave Thompson, pool)