OTD…April 26 and STS-55

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

#OTD in 2012…Endeavour’s coast-to-coast ferryflight into retirement arrives at Edwards Air Force Base

Studying the atmosphere as part of NASA’s Mission to Planet Earth was the objective of shuttle Atlantis’ STS-45 mission in March 1992.