In 2011, after their Afghanistan war documentary "Restrepo" was nominated for an Academy Award, photographer Tim Hetherington and writer Sebastian Junger were briefly embedded in a very different kind of place: Hollywood.

Attending the Oscars was perhaps as otherworldly as watching young soldiers sleeping in combat zones. "People who makes films generally aren’t in combat," Junger says. "People who are in combat generally don’t make films."

That heady trip made what happened next, Hetherington’s death from mortar fire while reporting on the Libyan civil war, even more tragic.

Hetherington’s work was lauded for its humane vision, for the photographer’s ability to capture human stories that undercut and deepened viewers’ perceptions of war. A tribute to that vision unfolds in Junger’s intimate new film, "Which Way Is the Front Line from Here? The Life and Time of Tim Hetherington," screening this week at Sundance in the Documentary Premieres program.

The documentary takes advantage of hours of videotaped interviews with Hetherington as he and Junger were promoting "Restrepo," which won the Grand Jury Prize in the documentary competition at Sundance three years ago.

Over the course of 10 years, Hetherington, who was mostly self-trained as a photographer, had successfully moved into documentary filmmaking. In a phone interview, Junger, the author of The Perfect Storm and War, talked about the singular vision of his friend and colleague, as well as the nobility of the work of war reporting. After the film’s Sundance launch, it will air on HBO in April.

Why did you make this documentary in the first place?

I wanted to remember and honor Tim’s life and his work and his humanity and his courage. He had this idea he was working on in Libya, how young men see themselves in combat and how they emulate the news images and from Hollywood. He called it the "theater of war." I wanted to bring that idea into public view.

How did you begin to make the documentary?

It came in stages. I organized a memorial for Tim in May — three weeks after he died. Some of the journalists who were with him in the attack (while covering the civil war in Misrata, Libya) and knew him well were coming to New York for the memorial. I had a lot of questions about how he died. Then I thought I should record the interviews, and if I was going to record them, I should videotape them properly in the studio.

One of the things that deepen the documentary is the video footage of Hetherington talking about his work. How did you have that kind of access?

We were very lucky. The timing was horrific in some ways. We had just been at the Academy Awards with a documentary about war. When it happened, when Tim died, all of those interviews he did to support the movie were suddenly available to us.