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

People stand along Aviation Blvd. as the space shuttle Endeavour lands at LAX in Los Angeles. (Photo by Wally Skalij/Los Angeles Times/MCT)

Emma White, of Team Cyclocrossworld, hits the dirt hard during the USA Cycling Cyclo-cross National Championship Elite Women's race at the Valmont Bike Park in Boulder, Colorado, on January 12, 2014. (Photo by Jeremy Papasso/The Daily Camera)

“Teenager Teenager”, an installation by the collaborative Chinese artists Sun Yuan and Peng Yu, at the exhibition “Crazy. Madness in contemporary art” in Rome on February 18, 2022. (Photo by Gloria Imbrogno/LiveMedia/Rex Features/Shutterstock)

A woman swings on a swing in Venao beach in Pedasi, Panama, Saturday, July 13, 2024. (Photo by Matias Delacroix/AP Photo)

Dog walkers enjoy the early morning sunrise at Tynemouth Beach in North Tyneside, on the north east coast of England on Monday, February 7, 2022. (Photo by Owen Humphreys/PA Images via Getty Images)

A “Free Syrian Army” fighter in the Bustan Pasha neighborhood of Aleppo, Syria, August 21, 2013. (Photo by James Lawler Duggan)