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, ...

Forty years after the Challenger disaster, NPR explores the engineers' last-minute efforts to stop the launch, their decades of guilt and the vital lessons that remain critical for NASA today.

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 ...

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 ...

A ceremony in Titusville, Florida, honored the 17 astronauts lost in NASA's Apollo 1, Challenger and Columbia tragedies. The Challenger shuttle exploded 73 seconds after its January 1986 launch, ...

On Jan. 28, 1986, the Space Shuttle Challenger exploded 73 seconds after takeoff. All seven crewmembers on board were killed, including the first teacher to go into space. The disaster was one of the ...

Like many of my generation, I watched the space shuttle Challenger explode on live television, while I was at school. I remember it very well, because I was a colossal space geek as a kid, and still ...

Forty years ago, the NASA space shuttle Challenger exploded 73 seconds after liftoff, killing all seven crew members. Among the seven crew members were five NASA astronauts, as well as a payload ...

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 ...