Daredevil Nik Wallenda prepares for Grand Canyon tightrope walk
Daredevil Nik Wallenda prepares for his Grand Canyon tightrope walk by facing 91mph winds created by air boats. The boats were stationed either side of the acrobat as he walked along a high-wire in his hometown of Sarasota, Florida. Wallenda was tethered during the practice but when it comes to the real thing, he will be following family etiquette by not having a tether or safety net.
The Grand Canyon tightrope attempt will be the highest ever for the 34-year-old - taller than the Empire State Building.
The walk will be shown live on the Discovery Channel this Sunday.
Wallenda is a seventh-generation member of the "Flying Wallendas" family of acrobats. Report by Ashley Fudge.