Daredevil stuntman Nik Wallenda
The holder of half a dozen world records will
walk across the Grand Canyon on a steel cable with nothing
but the Little Colorado River 1,500 feet below on June 23. With no tethers or safety nets, the walk will be the highest
tightrope attempt ever for the 34-year-old, at a height taller than the
Empire State Building.
Last year, Wallenda, a seventh-generation member of the "Flying Wallendas" family of acrobats, became the only person to walk a wire over the brink of Niagara Falls.

