OTD…July 4 and STS-121

#OTD in 1992…Discovery launched with the first International Microgravity Laboratory.

#OTD…Launch of Challenger in 1985 on a Spacelab research flight

Dave Scott, Jim Irwin and Al Worden left for the Moon today in 1971 aboard Apollo 15 bound for Hadley rille with the first Lunar Roving Vehicle.