Filmmaker Ken Burns talks with Recode's Kara Swisher about his latest documentary series "Country Music," in which he explores the history of the genre, its place in the larger American musical landscape, and the powerful universality of "three chords and the truth." Burns says that unlike rock and jazz, country music is largely a story about powerful women, and also unpacks the ways in which it reflects the intermingling ethnic diversity of the US. He also discusses his online video destination Unum, which lets people curate "mixtapes" of history by drawing connections among Burns' 38 years of docuumentaries, and why he's glad he wasn't one of the first people to make the leap to digital filmmaking. Plus: Burns previews the next seven films he's working on, including the American Revolution, the Great Society, and the Buffalo. Featuring: Ken Burns, director and producer, Country Music, and founder of Unum Hosts: Kara Swisher (@karaswisher), Recode co-founder and editor-at-large More to explore: Subscribe for free to Reset, Recode's new podcast that explores why — and how — tech is changing everything. About Recode by Vox: Recode by Vox helps you understand how tech is changing the world — and changing us. Follow Us: Newsletter: Recode Daily Twitter: @Recode and @voxdotcom