Jean François "Blondin" Gravelet was the first to successfully walk a tightrope across the gorge. Tightrope crosses ended by law in 1896 after James Hardy crossed it. In 2012, Nik Wallenda became the first to cross it in 116 years, after receiving permission from both governments. What was he carrying with him, which he presented when he arrived on the Canadian side?
His passport.