OTD…April 28 and STS-39

#OTD in 1989…Columbia launched with a classified communications satellite for the Defense Department

#OTD in 1982…Columbia launches on the fourth space shuttle mission. #OTD in 1995…Atlantis launches on first shuttle-Mir docking flight

#OTD…Launch of Columbia in 1998 on the Neurolab Spacelab mission