OTD…Feb. 22 and STS-75

#OTD…The first launch of Challenger in 1983 and Columbia’s shortened Spacelab mission in 1997

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.

#OTD…Launch of Endeavour in 2001 to deliver Canadarm2 to the space station