Florida-based daredevil Nik Wallenda is set to be the first person to walk across the Grand Canyon on a tightrope.
On Sunday, Wallenda will attempt to be the first person to walk a tightrope 1,400 feet across the Grand Canyon, without a safety net or a harness, CBS News reported.
The walk, which should take between 20 and 30 minutes depending on weather conditions, will be broadcast live by Discovery Channel on more than 200 networks.
