Almaz

thumb|Line drawing of an Almaz space station thumb|Almaz space station at VDNKh (Russia) The Almaz () program was a highly secret Soviet military space station program, begun in the early 1960s.

Three crewed military reconnaissance stations were launched between 1973 and 1976: Salyut 2, Salyut 3 and Salyut 5. To cover the military nature of the program, the three launched Almaz stations were designated as civilian Salyut space stations. Salyut 2 failed shortly after achieving orbit, but Salyut 3 and Salyut 5 both conducted successful crewed testing. Following Salyut 5, the Soviet Ministry of Defense judged in 1978 that the time and resources consumed by station maintenance outweighed the benefits relative to automatic reconnaissance satellites. Still, it had some achievements along with the Salyut program, the heritage of the twin program continues, with the International Space Station module Zarya being one example.