The Soviet Union launches Soyuz 37 on a week-long mission to visit space station Salyut 6. Part of the Interkosmos series, Soyuz 37 carries an international crew consisting of veteran cosmonaut Viktor Gorbatko and the first Vietnamese space traveler, Pham Tuan. Joint experiments are conducted with the long-duration crew of Salyut 6/Soyuz 35, and the Soyuz 37 crew departs in the Soyuz 36 capsule on July 31st, leaving the station crew with a fresh vehicle with which to make their own return home.
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