OTD…June 21 and STS-57

#OTD in 1991…Atlantis launched another of NASA’s Tracking and Data Relay Satellites

#OTD in 1995, Endeavour launched on the ASTRO-2 astronomy mission:

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