https://en.wikipedia.org/wiki/Conspiracy
It is a conspiracy.
Did you not read the quote?
Besides which, the US unilaterally gives itself the right to do these sorts of things at its own discretion on a regular basis.
I have no strong opinions yet in the argument over whether or not the USA conspired to sabotage the NS pipelines. I'm just here to point out that secrecy is not a required part of a conspiracy. The literal translation of "conspire" from Latin would be something like "to breathe together", insinuating a synchronization of movements, a plotting together.
But, in our world today, all conspiracies (both confirmed and theoretical conspiracies) seem to get bucketed together. And so in common parlance, as soon as a thing is publicly confirmed as actually happening, in most people's minds it moves out of the "Conspiracy" bucket into the "History" bucket. But that's just a loss of language on our part. As always, my go-to resource in recovering the meanings of English words is Webster's 1828.