"They killed me in Vietnam, and I didn't even know."
The thing is, a lot of people did know, or at least suspect and fear the impact of Agent Orange exposure. Dad told mom many years ago that if he ever contracted some weird form of cancer that it would be likely that it was caused by Agent Orange.
You might remember the essay I wrote awhile back about the argument I had with an RV salesman from Georgia when we were in Spain the first time about what the government knew and when they knew it. If you want to read about the first wave of legal battles over the effects, check out Fred Wilcox's work, which covers not only the impact on the US, but also on the impact in Vietnam.