I investigated post-traumatic stress disorder. I've been to a unit where people are suffering from it, and I read a lot of literature. I looked at footage of soldiers in the combat zone. I found 'Restrepo' to be unbelievably useful.

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“I investigated post-traumatic stress disorder. I've been to a unit where people are suffering from it, and I read a lot of literature. I looked at footage of soldiers in the combat zone. I found 'Restrepo' to be unbelievably useful.”