My comfort zone begins where most individuals quit. As a kid in Nepal, I went barefoot because my family had nothing. That's how I developed the resilience I needed for joining the Gurkhas - one of the most fearless forces in the British Army. Then against all odds, I became the first ever Gurkha soldier in more than 200 years of history to join the Special Boat Service where I served in the some of the world's most dangerous warzones, kicking down doors to capture enemy gunmen and terrorist bomb makers. But elite combat wasn't enough. I wanted more of a test. That's where my next project came in, something nobody thought possible - to climb all 14 'Death Zone' mountains in seven months. This is the inside story of my incredible adventure.