NYTimes: The Opinion Pages | OP-ED COLUMNIST 
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David J. Morris returned from Iraq with a case of post-traumatic stress disorder. The former Marine turned war correspondent was plagued by nightmares. His imagination careened out of control; he envisioned fireballs erupting while on trips to the mall. His emotions could go numb, but his awareness was hypervigilant. Images and smells from the war were tattooed eternally fresh on his brain, and he circled back to them remorselessly.