on february 1 , 1990 , during a spacewalk , alexander serebrov donned an experimental flying armchair that had been delivered to mir with kvant 2 . unlike eu . s . astronauts , who entered untethered flights with a matching devices , the soviet cosmonaut remains attached to the station with a protective mooring , since there is no space system to picking him up in cases of an alarm .
US shuttle Atlantis docks with the Mir space station.