Tonight at 9 p.m. ET, The National Geographic Channel debuts Restrepo , a documentary that follows one platoon in the Korengal Valley in Afghanistan, referred to by one soldier as the most dangerous place on earth. It was produced by photographer Tim Hetherington and journalist Sebastian Junger, who chronicled their experience there in a best-selling book, War . (The film will be released on DVD next Tuesday .) During a press conference for TV critics in August, Hetherington described it as an “apolitical film” that’s “from the solders’ point of view,” and that’s evident in the footage below, during which it’s described as being filmed “from a soldier’s perspective.” Perhaps the best explanation came from major Dan Kearney, who told critics that the film answers family members’ questions about soldiers’ experiences that they could otherwise not describe or explain. “One of the things that this film was able to strike a chord with was many of the wives and many of the loved ones, they ...