Thanks Nancy, I think that's important information. As an incidental comment, I had a friend, since passed, who was a foot soldier in Vietnam near the border. He and his unit happened to be under the flight path of transport planes spraying foliage with agent orange, and they passed overhead while dropping their load. Gary, my friend, said they flew only 200 feet above. He and his unit were saturated. Years later he developed terrible dermatitis and constant tremors, and after years of effort got a full disability. He died of multiple organ failure at the age of 56, though he looked two decades older.