(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.

It's now been 40 years since New Hampshire school teacher Christa McAuliffe died when the space shuttle Challenger exploded. All seven on board were killed when Challenger broke apart following ...

Add Yahoo as a preferred source to see more of our stories on Google. The Space Shuttle Challenger explodes shortly after lifting off from Kennedy Space Center, in Florida, on Jan. 28, 1986. All seven ...

LENEXA, Kan. (KCTV) - January 28, 1986. The Space Shuttle Challenger explodes 73 seconds after lift-off. School teacher, Christa McAuliffe was one of 7 astronauts on board the shuttle. Schools across ...

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 ...

It's just, it just numbed me. I was kept hoping that the vehicle could turn around and land in the emergency landing site here at Kennedy Space Center, but Unfortunately it couldn't. 7 people, 7 human ...

On Jan. 28, 1986, the world watched in horror as the Space Shuttle Challenger exploded above the Atlantic Ocean off the coast of Cape Canaveral, Florida, 73 seconds after liftoff, killing all seven ...

Editor's note: This story contains discussion of astronaut fatalities and dangerous moments in human spaceflight. It was 40 years ago today (Jan. 28) that the space shuttle Challenger blasted off on ...

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 ...

McAuliffe was a high school teacher from New Hampshire who was to be the first civilian and American teacher in space. She was selected as part of the Teacher in Space program. Her inclusion on the ...