My love for adventure started early. As a kid in Montana, I climbed the tallest trees, scaled the highest mountains. I scorned those who stayed on the paths, which was something I never did. If there was a challenging, dangerous way to get somewhere, I took it. I wasn't doing all this to show off. The act of jumping, soaring, or balancing gave me a feeling of freedom and exhileration that was addictive. The call...