They risk their lives to save others. From remote forward operating bases (FOBS), to the dun-coloured emptiness of the desert and snowy Hindu Kush mountains bordering Pakistan, the Medevac helicopter "Dustoff" crews are the first on the scene when a soldier goes down. For US and Afghan soldiers alike, they represent the last line of defence between life and death. For three weeks myself and award winning writer David Pratt followed these pilots and medics out of their base in Jalalabad, flying their mercy missions into some of Afghanistan’s most volatile front line regions. This edit was prepared for the New York Times. The footage also ran on ITN, CNN, NBC. Interviews conducted by David Pratt.