OTD…Jan. 28 and STS-51L

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 2001, Discovery launched on STS-102 to exchange crews aboard the International Space Station

#OTD in 1994, the launch of Columbia on the STS-62 microgravity research mission