Trained instincts—that's how fighter pilots can react immediately to rapidly changing situations as they operate $27 million war machines. When a threat aircraft is closing in, there's no time for pilots to reason through what to do. They have to rely on instinct—but not just natural instinct. They need instincts shaped deep within them through years of regiment. The countless little decisions they make in the cockpit are automatic, but that doesn't mean they're involuntary. The pilot voluntarily trained for them, and in the cockpit he reaps the instinctive benefits of that training.