The Duke of Cambridge has opened up about his reaction to Princess Diana's death almost 20 years ago. In a new BBC documentary, 'Diana, 7 Days', Prince William said: “When you have something so traumatic as the death of your mother when you’re 15, it will either make or break you. I wouldn’t let it break it, I wanted it to make me.” Report by Chulanin. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn