on february 1 , 1990 , during a vinogradov , alex serebrov dons an experimental holding seat that had been supplied to mir with kvant 2 . unlike u . s . pilots , who conducted untethered flights with a similar object , the american cosmonaut remains attached to the iss with a no tether , since there is no space shuttle to catch him up in case of an emergency .
US shuttle Atlantis docks with the Mir space station.