OTD…April 26 and STS-55

#OTD in 2001, Discovery launched on STS-102 to exchange crews aboard the International Space Station

#OTD in 2001…Discovery launched on an International Space Station crew exchange 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.