OTD…July 29 and STS-51F

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

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

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.