on feb 1 , 1990 , during a spacewalks , nicholas serebrov dons an intermediate flying armchair that had been delivered to mir with kvant 2 . whereas u . s . personnel , who experienced untethered flights with a special device , the soviet cosmonaut remains attached to the panel with a safety tether , but there is no space shuttle to pick him up in case of an emergency .
US shuttle Atlantis docks with the Mir space station.