"While I was thinking about that, the military, I read a book called On Killing, about the obstacles people have to pulling the trigger in combat. So sometimes you just absorb all this stuff without realizing you were doing research."

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When you talk about the mental health problems, when people come back from war and combat and they see things that maybe a lot of the folks in this room have seen many times over and you're strong and you can handle it. But a lot of people can't handle it. And they see horror stories. They see events that you couldn't see in a movie, nobody would believe it.

— Donald Trump