OTD…July 4 and STS-121

#OTD in 2009, shuttle Discovery delivers power payload to space station.

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.

#OTD in 1991…The launch of Columbia on Spacelab Life Sciences 1 mission