OTD…April 9 and STS-59

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

The final manned Mercury mission was launched atop an Atlas rocket on this day in 1963 with Gordon Cooper aboard Faith 7 for a 34-hour, 22-orbit flight.

#OTD in 1985…Challenger suffered an engine shutdown on her way to orbit for a Spacelab mission