I'll add a few of mine:
The Space Shuttle Challenger disaster: January 28, 1986
Was home "sick" actually playing hooky with my moms permission. I forget the details as to why but I remember watching it happen on our family room TV.
The Space Shuttle Columbia disaster: February 1, 2003
In follow up on the subject, I also remember this one. It was the day I began clearing out our basement as that Monday they were due to start putting in the theater.
The Berlin Wall: 1989
I don't recall the exact details around the events other than I was in College at OSU and aced political science and this and Exxon Valdez were two huge stories we discussed.
The Exxon Valdez oil spill March 24, 1989
As noted, I remember thinking this was a horrible accident that fucked up the area for what I believed would be my lifetime. It was one of the few Fridays in college we talked something serious while drinking beer. I'm sure the conversation shifted to talking about getting laid.
The Oklahoma City bombing: April 19, 1995
I remember this one too. I was at work traveling somewhere. I just remember hearing about it while on the road for work and popped into a radio shack to watch the news on TV to get the scoop.
The Iran hostage crisis: 1979
This one hits home as both my brothers were in the military and as a 9 year old I remember talking with my parents about whether Tom or Sam would be involved in some way.
The Falklands War: 1982
I remember this one as my oldest brother Sam was finally home from his 12 years serving in the US Air Force and was telling me all about the planes involved.