I barely remember the Shah/Iran situation. I was born in 1973, so I wasn't too old, but I remember that my Dad worked for NCR at the time and had to travel to Egypt, and we were worried about his safety.
I vividly remember Charles & Diana's wedding - I even wrote about it in my diary! "Her train was 25 feet long..."
I remember when Reagan was elected - I too voted for Anderson in our elementary school poll. I remember finding out on the playground from some older girls that he had been shot.
And, the Challenger tragedy. I was in junior high, found out in the gym locker room. I don't remember what year it was, but I do know it was January 28th - my birthday.