on february 1 , 1990 , during a spacewalk , alexandre serebrov brentford an experimental winged armchair that had been delivered to mir with kvant 2 . unlike n . s . crews , who flew untethered flights with a similar attachment , the russian cosmonaut remains linked to the facility with a loose tether , since there is no space shuttle to picked him up in case of an emergency .
US shuttle Atlantis docks with the Mir space station.