Repeating the trauma of Afghanistan is supposed to cure it. I don the state-of-the-art headset, 3 fucking D, and hold the controller. Hepatic feedback. Sit in the seat. Hepatic feedback. Humvee on a bumpy road? Not really. No way to simulate the choke of sand and smoke, but when she thinks you’re ready, the doctor adds smells—diesel, sweat, gunpowder, blood.