My fiancées younger brother, an atheist, served 2 tours in Iraq & 1 in Afghanistan. I know towards the end he was a sniper of some kind & has apparently killed more people than he cares to think about. He wasn't exactly stable when he went in & now has a pretty nasty case of PTSD.
"How is it that a lame man does not annoy us while a lame mind does? Because a lame man recognizes that we are walking straight, while a lame mind says that it is we who are limping." - Pascal