Add Yahoo as a preferred source to see more of our stories on Google. But the problem that drives the action in Apollo 13 was a real life-or-death turn of events for the three astronauts onboard. And ...

CAPE CANAVERAL, Fla. -- Apollo 13's astronauts never gave a thought to their mission number as they blasted off for the moon 50 years ago. Even when their oxygen tank ruptured two days later -- on ...