The origins of the Shuttle–"Mir" program can be traced back to the 1975 Apollo–Soyuz Test Project, that resulted in a joint US/Soviet mission during the détente period of the Cold War and the docking between a US Apollo spacecraft and a Soviet Soyuz spacecraft. This was followed by the talks between NASA and Intercosmos in the 1970s about a "Shuttle–"Salyut"" program to fly Space Shuttle missions to a "Salyut" space station, with later talks in the 1980s even considering flights of the future Soviet shuttles from the Buran programme to a future US space station – this "Shuttle–"Salyut"" program never materialized however during the existence of the Soviet Intercosmos program.