On Friday evening author Sebastian Junger joined "Anderson Cooper 360" for a primetime interview, during which he detailed the making of his new film, a documentary entitled "Korengal."

Named after one of the most dangerous valleys in Afghanistan, "Korengal" is the follow up to "Restrepo," the Academy Award nominated film that Junger made with his colleague, the late Tim Hetherington.

Though Hetherington was killed in Libya two years ago, Junger revealed to Anderson Cooper that he often felt his friend's presence in the editing room, as he worked on the sequel he says they'd always planned to make together.

Watch the above clip, as Junger tells the host that part of his reason for making his latest documentary centered around a desire to help people understand combat. And, for more on "Korengal," visit the films website.