OTD…July 26 and STS-114

#OTD in 1995…Columbia launched on a microgravity science Spacelab flight

#OTD in 1997…Columbia launched on the reflight of her shortened Microgravity Science Laboratory mission

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