It is hard to tell much from this video. If the caption on the video is correct, that 50m of pipe is missing, it would take a lot of explosives to make that happen.
Thinking out loud
Color me skeptical that it is accurate that pipe is "missing" and is typical of all four pipes. It is true that damaging the pipe in two locations only 50m/165' apart would significantly slow repairs, either by subsea habitat welds or hauling ends to the surface. Completely severing and removing a section of pipe would make repairs faster as oppose to just blowing holes.
IF the estimate is correct and this damage is typical of all four pipes, it really points the finger at the US. Plenty of countries have the diving and ROV expertise but, AFAIK, only the US has the capacity to pull it off without detection — saturation divers and/or ROVs from a submarine.
It takes a LOT of bottom time and explosives to cause this much damage. A few divers on rebreathers hauling plastic explosives from a small boat couldn't get it done without detection.
My first question would be where was the
USS Jimmy Carter? This is pretty close to an admission.
I find speculation that blames Russia for blowing up their own pipelines completely implausible. I can't conceive of a reason when closing valves on land serves the same purpose and keeps their options open.
Some of the nuke boat sailors on the board may have different opinions. Ping
@Bob DBF and
@formernuke