Awesome behind-the-scenes of the production of Lone Survivor (2013). Actors Mark Walhberg, Emile Hersch and Taylor Kitsch worked with director Pete Berg to portray the events of Operation Redwing; a fatal Navy Seals mission in Afghanistan. This involved acting and stunt work in mountainous terrain similar to the actual battlefield. Furthermore, the actors learned infantry and weapons tactics from Marcus Luttrell, the lone surviving SEAL from the disastrous 2006 operation. Great BTS footage from FilmIsNow that illustrates exactly how action films like this are created.