Hello, Death Star: Russia Had a Secret Cold War Space Station Equipped with Cannons – http://foreignpolicy.com/2016/12/14/spooks-in-space-race-death-star-nasa-apollo-intelligence-russia-china/

Back in 1968, three Apollo 8 astronauts circled the moon on Christmas Eve and returned home, where they were greeted with a ticker-tape parade and honored on the cover of Time. Far out of sight from these public celebrations, however, another group of astronauts was training to reach space. Unlike the Apollo program, these spacemen were part of a clandestine military operation that had less to do with peaceful exploration of the heavens and much more to do with wreaking havoc in them.

http://foreignpolicy.com/2016/12/14/spooks-in-space-race-death-star-nasa-apollo-intelligence-russia-china/