OTD…June 5 and STS-40

OTD in 1994…Endeavour experienced an on-pad abort due to a main engine problem during startup

#OTD in 1983…Challenger launched with America’s first woman astronaut. Watch the launch:

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.