The 25 Worst Mistakes In History, Faulty equipment causes the Challenger to explode on liftoff
Money lost in 1986: $5.5 billion was the cost of building the Challenger
Inflation adjusted value: $11.1 billion
In January of 1986, the Challenger, a NASA space shuttle, exploded just 72 seconds into its flight. All seven crew members on board died in the explosion.
The explosion was blamed in part to NASA’s faulty design. A combination booster joint with weak sealant, combined with freezing temperatures, caused the explosion.