Remembering Challenger 20 years later

Space History - MSNBC.com: "Remembering Challenger 20 years later
Twenty years ago, space shuttle Challenger blew apart into jets of fire and plumes of smoke, a terrifying sight witnessed by the families of the seven astronauts and onlookers who came to watch the historic launch of the first teacher in space."

I remember being told in high school by our home room teacher about the accident. I remember little else from home room, but I do remember that.