There's a high probability that Agent Orange is the cause of the Melanoma I'm currently dealing with. Side effects from the cancer meds nearly (literally) killed me in June.
I did three tours. I know I was in areas that had been sprayed, were actively being sprayed while I was in them, and down stream from sprayed areas. All our drinking water came from rivers and stream in those no bottled water days. And of course, there was also the chemicals used to make the 'water' safe to drink -- not to mention the little orange bomber anti-malaria tablets that gave you the trots.