"Lost On Everest," a new documentary directed by photographer, climber, mountaineer and Sony Artisan Renan Ozturk, premieres June 30 at 9/8 central on National Geographic TV. The documentary aims to answer the question of who really reached the summit of Mount Everest first, and will air before its side-story documentary, "Expedition Everest" – also directed by Ozturk. The two films are a complement to National Geographic Magazine’s July issue featuring stories from the mountain’s history.