Divers find Challenger space shuttle wreckage
STORY: Divers found remains of the Challenger space shuttle
off the East coast of Florida
The crew were initially looking for the wreckage of a World War Two aircraft
as part of a History Channel documentary
Instead, they found a 20-foot section of NASA's space shuttle Challenger
which exploded and broke apart shortly after its launch in 1986
All seven crew members were killed, including school teacher Christa McAuliffe
It remains one of the worst disasters in the history of the U.S. space program
