1982 Siberian Pipeline Blast Allegedly Caused by Trojan Horse (NY Times)
nytimes.com
nytimes.com
Now quoting from https://en.wikipedia.org/wiki/At_the_Abyss#Sabotage_allegati... "it was caused by poor construction rather than sabotage ... Another point of criticism of the sabotage allegations is that, according to Prof. V.D. Zakhmatov, an explosion safety expert who has overseen the safety measures on many of the Soviet oil and gas pipelines built in the Eighties,[4] at the described timeframe Soviet Union simply didn't practice digital control of its pipeline system. Most of the control was manual, and whatever automation was used utilized the analog control systems, most of which worked through pneumatics."