Pope Benedict XVI greets school children as he arrives at St Mary's University College at Twickenham, London Friday Sept. 17, 2010 as his personal secretary Georg Gaenswein, right, looks on. Thousands of cheering, British Catholic schoolchildren feted Pope Benedict XVI on his second day in Britain Friday, offering him a colorful welcome even as the pontiff told Catholic teachers they must provide a trusting, safe environment for children. (AP Photo Steve Parsons, Pool)