OTD…March 11 and STS-123

#OTD in 1985…Atlantis launched on her maiden voyage as a new orbiter joined the shuttle fleet

#OTD in 1996…Columbia launched on a life sciences and microgravity flight.

#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