When I was very young, I remember my grandmother watching a big funeral on TV. My guess is that it was either RFK or MLK Jr; I was 4 years old that year.

I was in high school when the principal made an announcement on the PA system that the hostages in Iran had been freed.

I don't remember the day Reagan was shot.

I was in college when the Challenger exploded. I first heard about it in an American Civilization class I was taking. The class was on American Popular Culture. We spent the whole time talking about it -- how people learned about it, why it was having such an impact on people, stuff like that.