OTD…Jan. 28 and STS-51L

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

#OTD in 2006…A star-spangled start to Discovery’s STS-121 mission

In the first memorial of its kind, NASA and the families of the 14 men and women who lost their lives aboard the shuttle Challenger in 1986 and Columbia in 2003 have joined together to remember the astronauts with pictures, personal mementos and, in an emotional first, iconic wreckage from both orbiters.