Looking back on the 30th anniversary of the space shuttle's explosion
(Newser) -
Thirty years ago, the space shuttle Challenger exploded after liftoff, killing all seven people onboard—including high-school teacher Christa McAuliffe. The 25th flight for NASA's space shuttle program was to have studied Halley's Comet and deployed two satellites, Discovery News reports; McAuliffe was to have taught science lessons...