What's the first major news event that you remember hearing about as a child? Where did you learn about it? How did it impact your world view?
The 1973 Presidential election. My whole school had a mock election and, since most of us were either children of Republicans or possibly influenced by the media, we elected Nixon in a landslide. Knowing only my parents' opinion of McGovern was "he's a hippie" (which I understood to be a Very Bad Thing -- never dreaming I would more or less go through my own hippie phase not too many years later), I naturally voted Nixon.
Then came Watergate and the resignation (I was somewhat older before I understood that the Watergate was a hotel, and not something to hold back a river), and I didn't really quite understand why everyone was so mad at Ford when he pardoned Nixon. I was a Ford supporter in the following election, and I think it was the last time I backed a Republican--I was a full-out liberal by the time Reagan came into office.
Reading some of the other responses to this makes me think "My goodness, you kids out there in ElJay land are SO YOUNG!!! *grin*