How Prince William and Kate Middleton honor Diana?

Five months ago, when Prince William first announced to the world he’d given a ring to Kate Middleton, he made it clear that only one other woman mattered as much to him. "It's my mother's engagement ring,” he told the press of the sapphire and diamond engagement heirloom. “Obviously she's not going to be around to share any of the fun and excitement of it all -- this was my way of keeping her