Earlier quoted context omitted.
"Most American students learned about it and knew that picture..." I'm 38: We didn't learn much about the Vietnam war, honestly. The sections on everything from the 50's onward were very short, and sometimes glossed over due to time constraints. I think we had one teacher tell us that it was simply because not enough time had passed since it happened, which always seemed ridiculous to me. It is kinda like we knew it…
If you took AP history they went through Regan.
I remember 3 books for summer reading, and a different project was having a somewhat historically accurate journal of someone moving west. She taught with a college book, and we had to buy it instead of rent the book.
But the same thing. Emphasis was much earlier, and by the end of the semester or school year, the stuff was glossed over. The information about things so current became more of an overview without so much information.