The Critical Hours: The Challenger Disaster: The Seventy Three Seconds that Changed NASA Forever

Seventy-three seconds.

That was all it took for the Space Shuttle Challenger to disappear into history.

On the morning of 28 January 1986, millions of people watched live as Challenger lifted gracefully into a clear Florida sky carrying seven astronauts, including teacher Christa McAuliffe. Just seventy-three seconds later, the Shuttle broke apart before a stunned world.

But the true story did not begin in those seventy-three seconds.

It began years earlier.

Drawing on official investigations, engineering evidence and eyewitness accounts, award-winning author Bill Stewart takes readers beyond the familiar television images to uncover the chain of technical decisions, management failures and organisational pressures that ultimately led to one of the most significant disasters in the history of space exploration.

This is not simply the story of an explosion.

It is the story of how intelligent people, working within one of the world’s most respected scientific organisations, gradually accepted increasing levels of risk until tragedy became unavoidable.

Inside you’ll discover:

• The development of the Space Shuttle programme

• The engineering design of the Solid Rocket Boosters

• Why freezing temperatures mattered

• The engineers who warned against launching

• The dramatic launch and the seventy-three seconds that changed history

• The Rogers Commission investigation

• Richard Feynman’s famous O-ring demonstration

• How Challenger transformed engineering and safety culture worldwide

• The enduring lessons for aviation, offshore energy, medicine, shipping and every high-risk industry

Written in Bill Stewart’s clear, cinematic documentary style, this book reveals not only what happened, but why it happened—and why the lessons remain just as relevant today.

Part of the acclaimed Critical Hours series.