the brothers sat down for an interview in the new bbc documentary about the deadly crash in paris. prince william called diana's death when he was just 15 traumatic and the hardest moment of his life. prince harry directed his anchor toward photographers who chased their mother on the night she was kill. >> i think one of the hardest things to come to terms with is the fact that the people that chased her, into the tunnel were same people taking photographs of her, while she was still dying in the back seat of the car. >> both princes say they intentionally waited 20 years to speak so candidly about their mother's death. prince william said they won't be doing it again. >>> if you shop at wal-mart it business to get easier to get what you need, partnership that will make shopping a breeze. >>> also ahead. >> ♪ >> the power of music how a nationwide program is helping some patients cope with illness and many cases giving them a new lease on life. >>> some might describe this