Within days, NASA concluded two rubber O-rings in Challenger’s right solid rocket booster had failed ... and pieces of the craft streaked across the sky. Parts of the shattered shuttle rained ...

It's been 39 years since the Challenger space shuttle, carrying seven people, took off from Florida's Kennedy Space Center, exploding in mere minutes.

For millions, it was an event that would be seared into their memories for the rest of their lives – on par with the Kennedy ...