Have you ever gotten so immersed in a video game so fully that you lost track of time? You’re climbing the mountains of Skyrim or cruising the universe in Mass Effect, and the next thing you know it’s evening and you haven’t eaten anything in eight hours.
The Humvee drives down a crowded street in a foreign land. A child waves. Merchants display their wares. Suddenly soldiers raise their rifles as a suicide bomber runs into the street, detonating his lethal package. This is virtual PTSD therapy.