I would take the supposed sabotage of the gas pipeline story with a large grain of salt. There isn't a shred of evidence for it, aside from the reminisces of a couple of retired spies decades after the supposed event, embroidered to spice up their autobiographies.

These comments from a Slashdot post on the subject cover many points:
http://it.slashdot.org/comments.pl?sid=95184&cid=8160185

"The fact still remains that there was simply no component available in those days that was complex enough for it to be practical to hide a trojan in"

Not to mention, if the Russians had suspected it was sabotage, they could easily have retaliated by blowing up any number of things in the US.