on february 1 , 1990 , during a spacewalk , alexander serebrov southend an improvised flying armchair that had been transported to mir with kvant 2 . unlike u . s . astronauts , having flown untethered laps with a certain apparatus , the soviet mir remains attached to the module with a special tether , and there is no aero system to pick him up in times of an alarm .
US shuttle Atlantis docks with the Mir space station.