Buzzdailyhub on Instagram: "On January 28, 1986, the world watched in shock. Just 73 seconds after liftoff, NASA’s Space Shuttle Challenger broke apart in midair, turning a routine mission into one of the darkest moments in space history. The disaster was caused by a failure in the solid rocket booster O-rings, which became brittle due to unusually cold temperatures that morning. Engineers had raised concerns before launch—but the mission went ahead anyway. Onboard were seven crew members, inclu