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Nik Wallenda walks across a tightrope 200 feet above U.S. 41 on January 29, 2013 in Sarasota, Florida. (Photo by Tim Boyles/Getty Images)

Daredevil's impressive canyon tightrope walk

Florida aerialist Nik Wallenda's successful tightrope walk took him a quarter mile over the Little Colorado River Gorge in northeastern Arizona on Sunday, near the Grand Canyon. He performed the stunt on a 2-inch-thick steel cable, 1,500 feet above a river, with no harness. The walk took just more than 22 minutes.