OTD…April 12 and STS-1 and 51D

#OTD in 1989…Atlantis launched the Galileo spacecraft to Jupiter and in 1993…Columbia launched on a life sciences Spacelab flight

#OTD in 1994…Endeavour launched on the second Space Radar Laboratory mission

#OTD in 1992…Columbia launches on the first Extended Duration Orbiter mission