31 years ago today, America's space program suffered one it's most tragic losses. All seven astronauts were killed when the space shuttle Challenger exploded seconds after lift-off.

I was in Florida, and having waited days to see the lift-off, I decided it was time to go home. I drove right past Cape Canaveral that morning, totally unaware of what had happened until hours later.

Many people remember watching the event live in their classrooms as this mission was the first to feature a civilian, teacher Christa McCauliffe, as part of the crew.

Do you remember where you were that fateful morning? Visit our Facebook page and tell me where you were in the comments section.

Here are links to a few interesting articles about that day...

7 Myths About The Challenger Disaster.

The Story Behind Reagan's Challenger Speech.

Yesterday also marked the 50th anniversary of the tragic death of the Apollo 1 astronauts in a fire on the launchpad.