I came back from Vietnam with a chest full of medals and a head full of nightmares, a full-blown case of post-traumatic stress disorder, the dreaded PTSD. I can’t count the number of times I’ve woken up from a deep sleep in the middle of the night and sat bolt upright in bed, dripping with sweat, my body tense, tingling all over, knowing I was about to die, reliving the worst moment in my life as if it were happening right now, instead of happening long ago in a place far, far away?