OTD…Aug. 18 and STS-68 abort

#OTD in 1998…The launch of Discovery on final shuttle-Mir docking mission

#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.