Allan J. McDonald retired as vice president and technical director for advanced technology programs at ATK Thiokol Propulsion in 2001. He was the director of the Space Shuttle Solid Rocket Motor Project at the time of the Challenger accident.
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On a cold January morning in 1986, NASA launched the Space Shuttle Challenger, despite warnings against doing so by many individuals, including Allan McDonald. The fiery destruction of Challenger on live television moments after launch remains an indelibl... SEE MORE