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

Galaxies on Instagram: "2011: Hand-held camera footage of space shuttle Endeavour’s external tank captured by the orbiter’s STS-134 crew as the ET falls away from the orbiter at main engine cut off (MECO) about 8-and-a-half minutes after launch. Via: @nasa"

US Air Force Female Soldier with GAU 18A Machine Gun