OTD…April 28 and STS-39

Today in 2011, shuttle Discovery made a graceful landing at Kennedy Space Center, returning from her final voyage after a remarkable three-decade life of service.

#OTD in 1983…Challenger lifts off on the first nighttime shuttle launch…and Discovery launches on her inaugural Spaceflight

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