Memorial of the <a href="https://en.wikipedia.org/wiki/Space_Shuttle_Challenger" class="extiw" title="w:Space Shuttle Challenger">Space Shuttle Challenger</a> crew <a href="https://en.wikipedia.org/wiki/STS-51-L" class="extiw" title="w:STS-51-L">STS-51-L</a>, Collection of the U.S. Senate
Charles Schmidt
<a rel="nofollow" class="external free" href="http://history.house.gov/Historical-Highlights/1951-2000/The-memorial-of-the-Challenger/">http://history.house.gov/Historical-Highlights/1951-2000/The-memorial-of-the-Challenger/</a>