OTD…Aug. 28 and STS-128

#OTD in 2002…Atlantis launched the outward expansion of the space station’s truss backbone

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

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.