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 ...

The two solid rocket boosters flew in different directions as the external fuel tank became a fireball.(AP: Bruce Weaver / File) Forty years ago, the Challenger space shuttle disintegrated just after ...

On Jan. 28, 1986, NASA’s 25th space shuttle mission, Challenger, left the launchpad in Cape Canaveral, Florida. Seventy-three seconds into... Lessons and failures from the Challenger space shuttle ...

On the morning of January 28, 1986, seven crew members were killed when the space shuttle Challenger broke apart a little over a minute after it launched. Those killed included five NASA astronauts, ...

Forty years ago today, Americans were stunned, shocked and saddened when the Challenger space shuttle exploded 73 seconds after liftoff on a cold, cloudless day in Florida. A booster leak ignited the ...

Forty years ago today, Americans were stunned, shocked and saddened when the Challenger space shuttle exploded 73 seconds after liftoff on a cold, cloudless day in Florida. [ Read more trending news ] ...

(CNN) - Wednesday marks the 40th anniversary of the Challenger space shuttle explosion. It was a moment of collective grief on Jan. 28, 1986, when the space shuttle exploded during a live broadcast.