Mystery Russian Spacecraft Stalking a Secret U.S. Spy Satellite?
Interesting article on something called 'The Daily Beast'.
Article intro:-
A mysterious Russian spacecraft has maneuvered into a new orbit around Earth right behind a secret U.S. spy satellite.
The unusual move by Russian Cosmos 2542 on Jan. 20 allows it to closely watch the American KH-11, a $4 billion orbital telescope staring down at Earth. And there’s not much that U.S. space operators can do about it.