@Elfie https://en.wikipedia.org/wiki/Duga_radar

> The duga at Chernobyl was the focus of the 2015 documentary film, The Russian Woodpecker, by Chad Gracia. The film includes interviews with the commander of the duga, Vladimir Musiets, as well as the Vice-Commander, the Head of the Data Center, and others involved in building and operating the radar. The documentary, which won numerous awards, also includes drone video footage of the array and handheld video footage of the surroundings as well as a climb to the top by the cinematographer, Artem Ryzhykov. The film also proposes a conspiracy theory that the Chernobyl disaster was engineered to cover up failures in the radar's design.