Bob Ebeling was anxious and angry as he drove to work on the morning of Jan. 28, 1986. He kept thinking about the space shuttle Challenger, cradled on a Florida launchpad 2,000 miles away. Ebeling ...

Roger Boisjoly, who led the eleventh-hour effort to delay the launch, testified about the O-ring task force, including his warning of a catastrophe six months before. Little of this testimony was ...

One engineer on that task force, Roger Boisjoly, wrote a memo six months before the Challenger disaster that warned of "a catastrophe of the highest order — loss of human life" if the O-ring problem ...

Five years and two dozen shuttle missions later, Morton Thiokol had a special task force working full time on O-ring blow-by. One engineer on that task force, Roger Boisjoly, wrote a memo six months ...