Up First from NPR Challenger at 40: Lessons from a tragedy
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Jan 25, 2026 
Howard Berkes, former NPR investigations correspondent who broke key reporting on the 1986 Challenger launch, revisits the tragedy. He recounts engineers warning about cold, the disputed launch decision, the teleconference reversal, and the long aftermath for those involved. The narrative probes institutional pressure, communication breakdowns, and whether the lessons endure as NASA changes.
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Engineers Warned Of Catastrophe
- Bob Ebling and other Thiokol engineers warned NASA the night before Challenger that freezing temperatures could cause catastrophic O-ring failure.
- Ebling drove to work that morning frantic, believing "Everyone's going to die."
How Risk Becomes Normalized
- Diane Vaughn's "normalization of deviance" explains why persistent risks went unaddressed after noncatastrophic failures.
- Organizations accept increasing risk when prior failures don't immediately produce disaster.
The 11th-Hour Teleconference
- Thiokol engineers presented data in an 11th-hour teleconference and recommended: "Do not launch the shuttle tomorrow."
- NASA managers challenged their data and after internal executive reversal Thiokol told NASA the boosters were ready.
