Chernobyl Nuclear Explosion Disaster Explained (Hour by Hour)

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