OTD…July 23 and STS-93

#OTD in 1990…Columbia launched to retrieve NASA’s Long duration Exposure Facility (LDEF) on the longest Shuttle flight to date.

Apollo 11 splashed down in the Pacific today in 1969, fulfilling President Kennedy’s challenge to a nation of landing a man to the Moon and returning him safely to the Earth.

The first crew to inhabit Skylab — Conrad, Weitz and Kerwin — launched today in 1973 for a 28-day mission that successfully made critical repairs, brought the station into operation and conducted solar astronomy, Earth resources and medical experiments.