We touch down on a landing pad outside Ibn Sina Hospital in Baghdad. A nurse and medic duck across the pad, their scrubs flapping in the rotor wash. They haul the soldier into the trauma room. Doctors and nurses swarm him. Someone continues CPR, others slide tubes down his throat, measure blood oxygen levels, check his pupils with a flashlight. Mitchell stands nearby, helmet tucked under his arm, downloading what he knows to a nurse. His bald head shines with sweat. Monitors beep, there is the gasp of breathing machines, the tear of bandages.

"I got blood coming out his ears!" a doctor is saying.

"Hey! I got a pulse!" another shouts. It's been five minutes since we arrived.

Mitchell grits his teeth in a tight smile and pumps his fist. Yes.

"I told you," he says, bouncing on his feet. "No one dies in my helicopter."

Then the mood shifts. Something is suddenly understood, it appears on the faces of the doctors. There is a pulse, nothing more. The soldier doesn't react to stimuli, shows no signs of life. There is a question about what to do. But Mitchell must leave, speed dictates, and we fly back to base to wait for the next call.

On the ground we learn the soldier's fate. Doctors discovered a metal fragment embedded deep in his brain. They decided an operation would be futile. The only hospital equipped to do that kind of brain surgery was too far away, in another part of Iraq. They pumped in pain meds, just in case, and waited for his heart to stop. For Mitchell, the flare of triumph dies. He looks at me blankly, then walks away, saying nothing. It doesn't always end like this. But these are the days the crews must get used to, the ones they never forget.

In Iraq, one massive U.S. military machine fights the war. Another cares for those injured in battle. The effort is enormous, unrivaled. Medical procedures and body armor have vastly improved since America's last comparable war, in Vietnam. Yet the techno-sheen given this war by smart bombs, night-vision goggles, and remote-controlled drones is misleading. It is not miracle technology that saves lives on the battlefield in Iraq. The most important tools are tourniquets, the most important methods timeworn.