OTD…Oct. 6 and STS-41

#OTD in 2007…Discovery launched Harmony as the gateway to future international science laboratories

#OTD in 1994…Discovery launched to develop new techniques for monitoring Earth’s environment from space…and in 2006…Construction of the space station resumed as Atlantis delivered a power-generating truss

#OTD in 1994…Columbia launched on a Spacelab microgravity flight