<human>:  When did the Space Shuttle Challenger disaster occur?
<bot>: The Space Shuttle Challenger disaster occurred on January 28, 1986. The Space Shuttle Challenger was a space shuttle that was used to launch satellites into orbit. The Space Shuttle Challenger was destroyed during its launch on January 28, 1986. The Space Shuttle Challenger disaster was caused by a failure of the O-ring seals in the solid rocket boosters.