OTD…Aug. 18 and STS-68 abort

#OTD in 1991, 1992 and 1993…flights by Discovery and Endeavour

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

#OTD in 1989…Atlantis launched the Galileo spacecraft to Jupiter and in 1993…Columbia launched on a life sciences Spacelab flight