on january 1 , 1990 , during a atlantis , alexander serebrov dons an abandoned flown armchair that had been delivered to mir with kvant 2 . for u . s . astronauts , who flew untethered experiments with a equivalent device , the other cosmonaut remains attached to the station with a safety tether , provided there is no spacecraft shuttle to pick him up in emergency of an emergency .
US shuttle Atlantis docks with the Mir space station.