In July of 1974, the USSR fired the first and only cannon to be shot into space. Haunted by fears of U.S. spacecraft inspecting or attacking Soviet spaceships and satellites, the R-23M Kartech 23-millimeter cannon had been secretly installed on the Salyut-3 as part of Project Almaz… a top-secret military space station program camouflaged in the cloak of civilian space exploration. Fully armed and operational, the space weapon would remain one of the world’s most closely guarded secrets until the fall of the Soviet Union…
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