The Space Shuttle Challenger Accident 1986 - Paper was written by Davinder S. Mahal with an introduction to the accident, the explosion, and the question as to what went wrong.
Spaceline: The Challenger Legacy - An in-depth analysis of the tragedy which includes a detailed description of causes, and lessons learned. Features a unique eyewitness account of the explosion and a rare list of missions canceled and/or remanifested as a result of the Challenger tragedy. Written by Cliff Lethbridge.