OTD…Jan. 28 and STS-51L

#OTD in 1991…The launch of Columbia on Spacelab Life Sciences 1 mission

Thirty years after the space shuttle Challenger disintegrated in the clear, cold sky high above Cape Canaveral, the commander’s widow no longer feels anger at NASA and the management missteps and schedule pressure that kept the orbiters flying despite a fatal flaw in their solid-fuel boosters.

#OTD in 1992…Discovery launched with the first International Microgravity Laboratory.