OTD…Aug. 18 and STS-68 abort

#OTD…Gamma Ray Observatory launched in 1991 on Atlantis and Discovery’s 2010 ISS flight

#OTD in 1985…Discovery launched on the first classified space shuttle mission for the Department of Defense. Watch the liftoff:

#OTD…Launch of a 1993 environmental mission on Discovery and Atlantis’ ISS flight in 2002