Vostok and Columbia
Old article from 2011 here about the two highly significant spaceflights that took place exactly twenty years apart, April 12th 1961 and April 12th 1981:
https://www.nasaspaceflight.com/2011...years-shuttle/
A heck of a lot happened in those twenty years..in the forty years since....????
Last edited by wiggy; 7th Apr 2021 at 18:11.