LONDON (AP) — It was a typical phone call between two boys playing and their mother, who was on vacation in France. William — second-in-line for the British throne after his father Prince Charles — was only 15 at the time. The documentary chronicles Diana's charitable works, including her historic outreach to AIDS victims and her campaign to ban land mines. William tells a story that reveals the privileged life they led as children — one day, Diana surprised him by having three of the world's top models waiting for him when he got home from school. William says he frequently tells his children — Prince George, 4, and Princess Charlotte, 2 — about Diana so she can be a presence in her grandchildren's lives.