In March, as part of an offensive to retake territory in the Kursk region, Russian troops crawled through a section of a decommissioned gas pipeline in an effort to slip behind Ukrainian lines. The mission quickly became a patriotic spectacle in Russia — complete with a scale-model pipe installed in a church courtyard and a song called “Truba” (“Pipe”), with a chorus that goes: “Pipe — that’s a Russian word! / Pipe — that means trouble!” Be that as it may, pro-war commentators soon began discussing the ways in which the mission had gone terribly wrong. Now, in a newly published video, a soldier who allegedly took part in the operation describes how some men suffocated inside the pipeline, while others died by suicide. Here’s what we know about the video.