OTD…April 29 and STS-51B

#OTD in 1989, Discovery launched a new Tracking and Data Relay Satellite

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

The flight of Gemini 4 launched today in 1965 for NASA’s first Extra Vehicular Activity spacewalk by Ed White on a four-day orbital mission with commander Jim McDivitt.