OTD…July 13 and STS-70

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

A mission to service the Hubble Space Telescope blasted off on this date in 2002.

#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