The pipeline has been built, the protest camps disbanded, but the fight isn't over. As pipeline opponents set up a new camp in Iowa, the Tiger Swan propagandists follow them, this time with the help of an undercover infiltrator. A WhatsApp chat reveals the private spies' machinations.

For a look at the primary documents underpinning this episode, head to https://drilled.media/.This mini-series was reported in partnership with High Country News, and a print feature accompanying it is available on their website: https://www.hcn.org/