Pepesdad, I'm not certain what was causing his ailments, but I do know that Agent Orange is causing many problems for many Vietnam Vets. I believe that it was the cause of many of my father's ailments before he died last year. It's sad to think that so many that came home are still paying the ultimate sacrifice so many years later.He, like many of his brothers in arms, paid the ultimate price for his efforts in Viet Nam.