The soldier in question has been ID'd as Staff Sgt. Sal Giunta, apparently for an action in the Korengal in 2007-08. The action is described in Sebastian Junger's book WAR, and also in the superb NYTIMES article by Elizabeth Rubin: "Battle Company is out there".

Around midnight, 1st Platoon filed into the KOP, eyes bulging, drenched in sweat, river water and blood. They were hauling the belongings of Mohammad Tali, a high-value target. Specialist Sal Giunta had killed him.

The next day I climbed up to the KOP and found Specialist Giunta, a quiet Iowan lofted into a heroism he didn’t want. His officers were putting him up for a medal of honor. Giunta told me the story of that night, how they’d barely moved 300 yards before they were blasted. Giunta was fourth in the file when it happened, and he jumped into a ditch. He couldn’t figure out why they were getting hit from where Joshua Brennan and baby-faced Franklin Eckrode should have been leading up ahead. He knew it must be bad, but as he leapt up to check he got whacked with a bullet in his armored chest plate. It threw him down. They were taking fire from three sides. He grabbed some grenades: “I couldn’t throw as far as Sergeant Gallardo. We were looking like retards and I decided to run out in front of the grenades.” He found Eckrode with gunshot wounds. “He was down but moving and trying to fix his SAW” — a heavy machine gun — “so I just kept on running up the trail. It was cloudy. I was running and saw dudes. Plural.”

He couldn’t figure out who they were. Then he realized they were hauling Brennan off through the forest. “I started shooting,” he recalled. “I emptied that magazine. They dropped Brennan.” Giunta scrambled up to Brennan. He was a mess. His lower jaw was shot off. “He was still conscious. He was breathing. He was asking for morphine. I said, ‘You’ll get out and tell your hero stories,’ and he was like, ‘I will, I will.’ ”

They were still taking fire. No one was there to help. Hugo Mendoza, their platoon medic, was back in another ditch, calling: “I’m bleeding out. I’m dying.” Giunta saw Brennan’s eyes go back. His breathing was bad. Giunta got Brennan to squeeze his hand. A medic showed up out of the sky. They prepared Brennan to be hoisted to the medevac in a basket. Soon he would be dead.

As the medevacs flew out, Sergeant Sandifer had talked in air cover: Slasher, the AC-130. The pilot was a woman and, Sandifer later told me, “It was so reassuring for us to hear her voice.” She spotted guys hiding and asked if she was clear to engage. “ ‘You’re cleared hot,’ I told her. And we killed two people together.” But, at this point, the killings were no consolation to Sandifer.

As Giunta said, “The richest, most-trained army got beat by dudes in manjammies and A.K.’s.” His voice cracked. He was not just hurting, he was in a rage. And there was nothing for him to do with it but hold back his tears, and bark — at the Afghans for betraying them, at the Army for betraying them. He didn’t run to the front because he was a hero. He ran up to get to Brennan, his friend.