Howard Berkes, NPR: Remembering Allan McDonald: He Refused To Approve Challenger Launch, Exposed Cover-Up
Allan J. McDonald (died March 6, 2021) was an engineer, aerospace consultant, author and the director of the Space Shuttle Solid Rocket Motor Project for Morton-Thiokol, a NASA subcontractor. He refused to sign off on the launch of the Space Shuttle Challenger which broke apart 73 seconds into flight in the Challenger disaster in January 1986. Deeply affected by the loss of the Challenger astronauts, McDonald endeavored to reveal the truth about the pressures to stay on launch schedule that led to the tragedy. He co-authored Truth, Lies, and O-Rings: Inside the Space Shuttle Challenger Disaster.
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