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 Read Full Article: https://www.grunge.com/197368/the-worst-part-of-the-space-shuttle-challenger-disaster-isnt-what-you-think/