Yes there is a story about Agent Orange and we knew that it harmed our troops and we knew how long it was to get the medical community to accept that the military to accept it the VA to accept it.

Random Quote

I think human society for tens of thousands of years has sent young men out in small groups to do things that are necessary but very dangerous. And they've always gotten killed doing it. And they've always turned it into a matter of honor and a way of gaining acceptance back into society if they survived.