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 space shuttle's seven crew members died, including one civilian teacher. The tragedy changed the course of NASA's future. On the morning of January 28, 1986, seven crew members were killed when ...

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 over Florida, killing all seven ...

Add Yahoo as a preferred source to see more of our stories on Google. This year marks the 40th anniversary of the Challenger explosion, which occurred 73 seconds after liftoff on Jan. 28, 1986, ...

(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.

On Jan. 28, 1986, the 25th space shuttle mission Challenger left the launchpad in Cape Canaveral, Florida. Seventy-three seconds into flight, Challenger exploded over the Atlantic Ocean as millions of ...

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 ...