It was one of the most searing images of the twentieth century: two young boys, two princes, walking behind their mother's coffin as the world watched in sorrow and horror. As Diana, Princess of Wales, was laid to rest, billions wondered...

It was one of the most searing images of the twentieth century: two young boys, two princes, walking behind their mother's coffin as the world watched in sorrow-and horror. As Princess Diana was laid to rest, billions wondered what...