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 ...

This browser does not support the Video element. Seven astronauts were killed in the 1986 space shuttle Challenger disaster. Because a teacher was aboard, millions of schoolchildren watched the event ...