At 11:38 AM local time, everything looked normal as Mission Control told Scobee “Challenger, go with throttle up.” However, just 73 seconds after liftoff, at an altitude of around 46,000 feet, or ...

Add Yahoo as a preferred source to see more of our stories on Google. Forty years ago, the world watched in horror as NASA's space shuttle Challenger exploded mid-air, killing all seven crew members ...

Seven astronauts were killed in the 1986 space shuttle Challenger disaster. Because a teacher was aboard, millions of schoolchildren watched the event live in school. Forty years later, many of those ...