It's the 50th anniversary of Apollo 13 - one of the most remarkable rescue missions in history. Tom Durkin looks back on the nearly fatal mission.

On April 11, 1970, Apollo 13 lifted off for the moon. Two days later, with the spacecraft well on its way, an oxygen tank exploded, causing the second tank to fail. Those on board were put in major jeopardy and were forced to scrub the lunar landing.

NASA’s “can-do” spirit lives on today, as America’s space agency is working to send astronauts back the moon by 2024 with an eye toward Mars.