OTD…May 15 and Faith 7

#OTD in 1996…Columbia launched on a life sciences and microgravity flight.

#OTD…Launch of a 1994 Space Radar Lab mission on Endeavour

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.