NASA's space shuttle Challenger exploded 40 years ago today, killing its 7-person crew. Photos reveal Challenger's legacy.

NASA's space shuttle Challenger completed 10 missions before it broke apart during a launch in 1986, killing seven astronauts ...

Space shuttle Challenger remembered 40 years after explosion

Forty years ago, Americans were shocked when the space shuttle Challenger exploded 73 seconds after it launched on a chilly ...

On This Day : Space Shuttle Challenger is lost

On this day in 1986, millions watched on live TV as the Space Shuttle Challenger exploded moments after launch ...