Ken Burns, the filmmaker who did the documentaries, The Civil War, The Roosevelts, The National Parks and The Vietnam War, among others, is doing a documentary on country music as his next project. It is due to air sometime in 2018. I saw a short preview last night on PBS. There was old film footage, and interviews done specifically for this documentary. The only people being interviewed in the preview were Brenda Lee, Kris Kristoffersen and Garth, but there will be many more. I hope they also include Carrie. These documentaries are always very thorough and shown over multiple nights. The Vietnam War was shown over 10 nights, The Roosevelts was 8 nights. Ken was saying what a huge subject country music is, so I would expect this documentary would also be shown over several nights.