Terrifying on Instagram: "On Tuesday, January 28, 1986, at 11:39 a.m. EST, the Space Shuttle Challenger (mission STS-51-L) launched from Kennedy Space Center in Florida. Among the seven crew members was Christa McAuliffe, a high school teacher selected to be the first private citizen in space through NASA’s Teacher in Space Project. Seventy-three seconds after liftoff, at an altitude of approximately 46,000 feet, the shuttle suffered a catastrophic structural failure. A flawed design in the Soli

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Terrifying on Instagram: "On January 28, 1986, millions watched live as the Space Shuttle Challenger launched from Kennedy Space Center in Florida—only to break apart just 73 seconds after liftoff. All seven astronauts on board lost their lives, including Christa McAuliffe, a schoolteacher who had been selected as the first civilian to travel into space. For her students, and for viewers across the country, the moment was heartbreaking. The disaster was traced to a faulty O-ring seal in one of t