At 06:12, the aircraft entered the mountains. The autopilot was flying. That was exactly how the Pilot wanted it. Altitude steady. Course steady. Airspeed steady. The navigation system tracked the planned route through a broad valley toward the western pass. The machine made hundreds of tiny corrections without complaint. The Copilot studied the instruments. “She's holding it better than I could.” “Probably.” “Better than you?” The Pilot smiled. “Probably.”