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.
US daredevil Nik Wallenda became the first man to cross the Grand Canyon on a tightrope Sunday, completing his latest record-breaking feat in just under 23 minutes.