From faulty O-rings to deadly weather and foreboding warnings. The engineers closest to the Challenger Space Shuttle knew what was wrong — so why didn’t NASA step in?

#Disaster #Challenger #NASA

The O-rings | 0:00
18 degree weather | 1:39
String of delays | 2:56
The disaster | 4:11
The trapped crew | 5:12
The grim recovery | 6:15
Engineers felt responsible | 7:27
The crew was conscious? | 8:25

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