This year marks 20 years since Princess Diana was killed in a car accident on August 31, 1997. In an all-new, two-hour special, Dateline takes an in-depth look at the life and death of the 'People's Princess', featuring exclusive interviews and new details about Diana’s troubled marriage, turbulent life in the monarchy, love affairs, tragic death and ensuing investigation. Andrea Canning reports Friday May 5 at 9/8c.May 4, 2017
