OTD…Oct. 15 and Cassini

Today in 2011, shuttle Discovery made a graceful landing at Kennedy Space Center, returning from her final voyage after a remarkable three-decade life of service.

#OTD in 1999…Columbia launched with the first woman commander and the Chandra X-ray Observatory

#OTD…Gamma Ray Observatory launched in 1991 on Atlantis and Discovery’s 2010 ISS flight