If you read the replies and the other links, The Daily Mail embarassingly botched what they copied from the Free Beacon - the claim in the orginal story is that a Russian AGI was in Jacksonville, not a submarine.
And embarassingly and amusingly, both stories managed to misspell “Sierra.”
Well, that’s a world of difference.
Yes, it was an AGI. Still, there is going to be a lot of spooks running around Jacksonville Harbor. As soon as the ship is out of harbor they are going to send divers down to check the hull for all bugs we attached to it, LOL.