Victoria Nuland, yes she's a first class deep water diver and obviously has first hand knowledge of such underwater matters.
(Meant to reply to you.)
In the end no one side may ever really know with absolute certainty, but that rogue, Victoria Nuland, bragged about doing it before and after it was done. So then, one has to go on reasonable probabilities. Did Russia blow up their own $30 billion pipeline, or did Biden do it as he pledged to, because, you know, Cornpop?
At this juncture, and unless proven otherwise, I believe this was an arrogant act of war and injustice by a White House and Deep State government that feels absolutely no pressure whatsoever that they will be called out or held to any account on anything.