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They [service members] come home many of the fittest and best-trained warriors in the world, never the same. Headaches, numbness, dizziness, a cancer that would put them in a flag-draped coffin, one of those soldiers was my son, Maj. Beau Biden. I don't know for sure if the burn pit that he lived near, that his hooch [barracks] was there in Iraq, and before that Kosovo, is the cause of his brain cancer and the disease of so many other troops. But I am committed to find out everything we can.