Millions of viewers tuned in to the Discovery Channel to watch aerialist Nik Wallenda attempt what he has said was his toughest tightrope walk yet – crossing over the Grand Canyon at 1,500 feet without using a tether or net. What was going through his mind? And were there ever moments of doubt? Wallenda will watch the historic event from start to finish for the first time and provide a step by step account of what he was thinking and experiencing physically with each movement. This special presentation will give viewers insight into one of the most talked about events of the year.